Ouroboros Meaning: The Snake That Eats Its Own Tail

What the ouroboros is, and what the name gives away

The word is Greek and describes exactly what you see: oura means tail, boros devouring. The tail-eater. What is meant is a snake — less often a dragon, and in the Renaissance frequently a winged one — that takes its own tail in its mouth and so closes a circle.

Two things get run together constantly in popular writing, and they are worth keeping apart. The image — the circular snake — is old and widespread. The name "ouroboros" as a fixed term for it is considerably younger; it surfaces in Greek late antiquity and only becomes a technical term in early modern alchemy. The Egyptians who painted the image first had no word for it that we know. They had snakes that formed circles, and a cosmos bounded by a serpent. So anyone who says "the Egyptians worshipped the ouroboros" is right about the picture and wrong about the word.

Egypt: the snake on Tutankhamun's gilded shrine

The oldest securely datable ouroboros is not on a papyrus. It is on gold. In the tomb of Tutankhamun, who died around 1323 BCE, Howard Carter found four gilded shrines nested around the sarcophagus. The second from the outside is engraved with a text Egyptology calls the Enigmatic Book of the Netherworld — a cryptographically written description of the afterlife. A large figure lies there, probably the united sun god and Osiris, and around its head and its feet coil two snakes, each with its tail in its mouth. The caption names them Mehen, "the coiled one" — the protective deity who envelops the sun god on his night journey.

That is the core of the Egyptian meaning, and it is not "eternity" in the romantic sense. The snake bounds. It draws a circle around what is ordered and keeps chaos outside, the way the serpent Apophis, enemy of the sun, waits each night at the edge of the world. Here the ouroboros is a border between cosmos and nothing. That it also suggests the eternal circuit of the sun returning each morning out of the night is true — but that is the second layer, not the first.

If you saw the Tutankhamun material when it toured American museums, this is the object class you were looking at: funerary gold whose imagery is a technical diagram of the night, not decoration.

Alexandria: "one is the all"

The turn that brings the ouroboros into European intellectual history sits in a manuscript in Venice. The Codex Marcianus graecus 299, written in the tenth or eleventh century, collects texts of Greco-Egyptian alchemy that are far older; the core is dated to roughly the third century CE. One page of that collection, headed Chrysopoeia ("gold-making") and attributed to a certain Cleopatra — not the queen, but an alchemist whose name is a programme — carries the drawing that has decorated every book on the subject since: a circle made of a snake, half light and half dark, with three Greek words at its centre, hen to pan, "one is the all."

With that, the ouroboros has moved from world-boundary to world-principle. The Alexandrian alchemists — Zosimos of Panopolis, Olympiodorus, the pseudo-Cleopatra — held that all substances come out of one prime matter and return into it, and that the Great Work consists of reproducing that circuit in the vessel: dissolve, fix, dissolve. A snake that consumes itself and stays whole was the perfect picture for it. Its light and dark halves are the opposites — volatile and fixed, sun and moon, sulphur and mercury — that become one in the circle. Anyone who knows what the Emerald Tablet actually says has read the same sentence in another form.

Gnosis and late antiquity: the dragon that encircles the world

At roughly the same time, Gnostic readers took the image from its dark side. Around 248 CE, the Christian scholar Origen describes, in Contra Celsum, a diagram used by the Ophites ("snake people") in which Leviathan encloses all the spheres of the world as a circle — the world soul, which is at the same time the soul's prison. The Coptic Pistis Sophia of the third or fourth century is blunter still: the outer darkness is a great dragon with its tail in its mouth, and the chambers of punishment lie inside its body. The same circle that meant unity to the alchemists is a prison wall here.

Then Horapollon. His Hieroglyphica, written in Egypt in the fifth century and rediscovered in Europe in 1419, set out to read the long-unreadable hieroglyphs as emblems. Near the start he explains that to represent the universe the Egyptians paint a snake devouring its tail, its scales the stars, its body the weight of the earth, its shedding the yearly renewal — and that its self-consumption means everything God brings forth in the world returns into it. Renaissance humanists devoured that passage. Nearly every ouroboros in the emblem books of the sixteenth and seventeenth centuries traces back to it.

The ouroboros through time — who meant what

When	Source	What the snake means there
c. 1323 BCE	Enigmatic Book, Tutankhamun's shrine	Mehen the encircler — boundary between order and chaos, protection of the sun god
3rd c. CE	Chrysopoeia of Cleopatra	"One is the all" — unity of substances, circuit of the Great Work
3rd–4th c.	Origen; Pistis Sophia	World-encircler, Leviathan, the wall of the outer darkness
5th c.	Horapollon, Hieroglyphica	Hieroglyph for the universe, renewal, return of all created things
13th c. (older material)	Prose Edda, Gylfaginning	Jörmungandr, the Midgard serpent — girdle of the world until Ragnarök
1478	Theodoros Pelecanos, copy of Synosius	The famous green-and-red drawing — model for most modern depictions
1617	Michael Maier, Atalanta Fugiens, Emblem XIV	The dragon eating its tail — prima materia, solve et coagula
1890	Kekulé's benzene-anniversary speech	Dream image for the ring structure of benzene
1944–1955	C. G. Jung; Erich Neumann	Archetype of the Self; the "uroboric" first stage of consciousness

The Norse relative: Jörmungandr

You often read that the ouroboros is "universal" and appears in all cultures. That is half right. The image of a world-spanning serpent does occur repeatedly — but it does not everywhere bite its tail, and it does not everywhere mean the same thing.

The finest relative is the Midgard serpent of Norse myth. Snorri Sturluson tells in the Gylfaginning that Odin threw the monster into the sea, where it grew until it girdled the whole earth and bit its own tail. When it lets go, Ragnarök begins. Thor hooks it using an ox head as bait and has to let it go again.

That is an ouroboros — but one that does not protect the world, it threatens it, and whose circle is not an emblem of unity but a timer. Whether the Norse image came from the Mediterranean or arose independently, we do not know; the manuscripts are young and the material is old. For the cosmos that serpent girdles, see Yggdrasil and the nine worlds; for serpent beings elsewhere, the nagas and the broader symbolism of snakes have their own entries.

Renaissance alchemy: solve et coagula

The alchemy of the fifteenth to seventeenth centuries made the ouroboros into what it is for most people today. In 1478 a scribe named Theodoros Pelecanos copied an older Greek collection, the so-called Synosius, and drew alongside it the snake that now comes up first in any image search: green and red, with a serrated back, in a circle containing nothing but itself.

In 1617 Michael Maier set Emblem XIV in his Atalanta Fugiens — the dragon that devours its tail — with a fugue, a poem and a commentary reading the dragon as the prima materia, the starting substance of the Great Work, which must decompose itself so that something new can come out of it.

Here the circle becomes an instruction. Solve et coagula — dissolve and fix — is the rhythm of the alchemical process, and the self-eating snake shows that both are the same operation: the substance destroyed is the substance produced. In the Lambspring figures (1599) and the emblems of the Musaeum Hermeticum (1625) the dragon sometimes eats itself entirely and sometimes two dragons bite each other, the winged and the wingless — volatile and fixed, the Alexandrian opposites again. The groundwork is in spiritual alchemy and in the hermetic principles.

Kekulé and Jung: the snake in the lab and on the couch

Two modern stories gave the sign a second life. The first is chemistry. On 11 March 1890 the German Chemical Society in Berlin held its "benzene jubilee," twenty-five years of benzene theory, and the honoured August Kekulé told the audience how the ring structure had come to him: half asleep by the fire, in a dance of atom chains, until one of the snakes seized its own tail and whirled mockingly before his eyes. Whether that dream happened as told, or was a well-crafted anecdote for a celebratory audience, historians of science still argue. The speech is documented; the dream is reported.

It is worth saying plainly what this story does and does not show. It is not evidence that symbols contain chemical truths. At most it is evidence that a mind already saturated with a problem will reach for whatever image is lying around — and in a nineteenth-century European education, the tail-eating snake was lying around.

The second story is psychology. Jung read alchemy as a projection of inner processes, and the ouroboros was for him the primordial image of what he called the Self: a wholeness that feeds on itself, swallows its own opposites and gives birth to them again. His student Erich Neumann turned that in 1949 into a developmental stage — the "uroboric" phase in which the infant does not yet distinguish between itself and the world; paradise and prison at once, out of which the ego has to work its way. Which closes the circle, Gnostically enough, back to the Pistis Sophia.

Five readings — what the ouroboros can mean

After three thousand years there is no single meaning, but a bundle. If you wear the sign, draw it or think with it, these are the documented options:

1. Boundary. The Egyptian reading: the circle that holds order in and chaos out.
2. Unity of matter. The Alexandrian reading: one is the all; everything comes from one source and returns to it.
3. Prison. The Gnostic reading: the world-encircler as the wall of a cell.
4. Process. The Renaissance reading: destruction and creation as one operation.
5. Self. The Jungian reading: wholeness that contains its own opposites.

Notice that two and three are flatly incompatible, and both are historically real. That is the honest state of the evidence, and it is more interesting than a single tidy answer.

Before you wear it: tattoo, ring, logo

The ouroboros is one of the most tattooed esoteric symbols in the United States, and most of the readings above never come up at the shop. A few practical notes:

• Decide which reading you mean before you commit it, because people will ask, and "infinity" is the one answer that is not in the historical record in that form.
• The circular form is not owned by anyone — it is ancient and public. Specific modern drawings of it are not: an artist's rendering, a band's logo treatment or a brand's mark is that party's work. Bring references to a tattooer as inspiration, and have them draw you an original.
• Check the mouth. A great many commercial designs show a snake curled into a circle without actually biting its tail. That is a circle with a snake in it, not an ouroboros.
• If you want the dark reading, say so. The Gnostic and Norse versions are not decorative, and an artist who knows that will draw a different animal.

What we don't promise

We make no claim that wearing or drawing the ouroboros protects you, changes your circumstances, or does anything at all beyond what any meaningful object does: remind you of something you decided. The historical readings above are documented as readings, not as facts about the world. Where a claim is legend — Mehen, Jörmungandr, the dragon of the outer darkness — we have said so in the table rather than blurring it into history.

Practically: how to work with this

1. Name your reading in one sentence and write it down. If you cannot, you have an aesthetic preference rather than a symbol, which is fine — but say that instead.
2. Read the Egyptian meaning before the Jungian one. The order stops you from back-projecting twentieth-century psychology onto a New Kingdom shrine.
3. Keep the contradictions. If you are using the sign as a thinking tool, the fact that it meant both wholeness and imprisonment is the useful part.
4. Source your image honestly. Public-domain historical plates exist in abundance; there is no need to lift a living artist's version.

Frequently asked questions

How old is the ouroboros?
The image is at least about 3,350 years old in its securely dated Egyptian form. The Greek name is far younger.

Does it mean infinity?
Not in the historical sources. "Infinity" is a modern gloss. The documented meanings are boundary, unity of matter, imprisonment, process and wholeness.

Is it the same as the Midgard serpent?
Formally yes, in meaning no. Jörmungandr's circle is a threat whose breaking starts the end of the world.

Did Kekulé really dream it?
He said so in 1890, twenty-five years after the fact, at a celebration. The speech is documented; whether the dream occurred as described is disputed.

Is it a satanic symbol?
No. It has no place in the historical demonologies. Its darkest documented use is Gnostic cosmology, which is a different thing entirely.

What is the difference between an ouroboros and a snake in a circle?
The tail has to be in the mouth. That is the whole definition.

Sources & further reading

• Alexandre Piankoff, The Shrines of Tut-Ankh-Amon, 1955 — the Enigmatic Book of the Netherworld and the Mehen serpents.
• Erik Hornung, The Ancient Egyptian Books of the Afterlife, 1999.
• Codex Marcianus graecus 299, Biblioteca Nazionale Marciana, Venice — Chrysopoeia of Cleopatra.
• Origen, Contra Celsum VI, c. 248 CE; Pistis Sophia, Coptic, 3rd–4th century.
• Horapollon, Hieroglyphica, 5th century; rediscovered 1419.
• Michael Maier, Atalanta Fugiens, 1617, Emblem XIV.
• Snorri Sturluson, Prose Edda, Gylfaginning, 13th century.
• C. G. Jung, Mysterium Coniunctionis, 1955–56; Erich Neumann, The Origins and History of Consciousness, 1949.