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Ichor

Ichor is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Ichor rather than just read about it. In short: In Greek mythology, ichor () is the ethereal fluid making up the blood of the gods and/or immortals. The Ancient Greek word ἰχώρ (ikhṓr) is of uncertain etymology, and has been suggested to be a foreign word, possibly the pre-Greek substrate.

Ichor — main illustration
Ichor — illustration

Key takeaways

  • Ichor belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Ichor to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Ichor from memory before moving on to harder problems.

Reference excerpt

In Greek mythology, ichor () is the ethereal fluid making up the blood of the gods and/or immortals. The Ancient Greek word ἰχώρ (ikhṓr) is of uncertain etymology, and has been suggested to be a foreign word, possibly the pre-Greek substrate.

In classical myth Ichor originates in Greek mythology, where it is the "ethereal fluid" that is the blood of the Greek gods, sometimes said to retain the qualities of the immortals' food and drink, ambrosia and nectar. Great heroes and demigods occasionally attacked gods and released ichor, but gods rarely did so to each other in Homeric myth. According to G.S. Kirk, the term is used in the sense of "divine equivalent of blood" only twice, in the Homeric passages of the Iliad. The goddess Athena confers on Diomedes the ability to distinguish gods and mortals, and grants specific permission to wound Aphrodite.:

The scene where Diomedes with spear is on the verge of confronting and wounding Aphrodite is depicted on the Sarti tabula iliaca (cf. fig. right). In the second passage shortly after in the Iliad where ichor recurs, Aphrodite (Dione) merely wipes the ichor (ἰχῶ, v. 416) with both her hands, and she is none the worse for wear. So despite the agony it carried, the wound inflicted by the mortal turned out to be but a slight one. In Ancient Crete, tradition told of Talos, a giant man of bronze and ichor. Apollodotus explains that Talos had a single vein running from neck to ankle, pinned down by bronze nails. Talos encircled the island, guarding it, so that when the Argonauts arrived (having already acquired the Golden Fleece), Talos threw boulders at their ship. The sorceress Medea defeated it by either driving it to madness with drugs, or falsely promising to give it immortality, and pulling out the nail (presumably the lower one at the ankle) draining out all its ichor. In Apollonius of Rhodes's account, Talos nicked its ankle on a crag and the precious ichor gushed out like molten lead. Prometheus was a Titan, who made humans and stole fire from the gods and gave it to the mortals, and consequently was punished by Zeus for all eternity. Prometheus was chained to a rock for his sin, and his liver was eaten daily by an eagle. His liver would then regrow, just to be eaten again, repeated for all eternity. Prometheus bled ichor, a blood-like substance that would cause a magical herb to sprout when it touched the ground (cf. connection to mandrake lore):

It [a magical herb] first appeared in a plant that sprang from the blood-like ichor of Prometheus in his torment, which the flesh-eating Eagle had dropped on the spurs of the Kaukasos.

As allusion Because Alexander the Great fashioned himself as a son of god, once when he received injury that drew blood, the grappler Dioxippus told the king "That is 'ichor', such as flows in the veins of the blessed gods", according to Aristobulus of Cassandreia Plutarch in Parallel Lives has the king himself say "This, you see, is blood, and not 'ichor', etc.".

In medicine In pathology, "ichor" is an antiquated term for a watery discharge from a wound or ulcer, with an unpleasant or fetid (offensive) smell. The Greek Christian writer Clement of Alexandria deliberately confounded ichor in its medical sense as a foul-smelling watery discharge from a wound or ulcer with its mythological sense as the blood of the gods, in a polemic against the Greek gods. As part of his evidence that they are merely mortal, he cites several cases in which the gods are wounded physically, and then asserts that

if there are wounds, there is blood. For the ichor of the poets is more repulsive than blood; for the putrefaction of blood is called ichor.

See also Blood of Christ Ectoplasm (paranormal) Petrichor

Explanatory notes

References

External links

Worked examples

Example 1 — a first encounter with Ichor

Start with the simplest possible case. Write down what Ichor claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Ichor before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Ichor ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Ichor

In research
Ichor appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Ichor in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Ichor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Blood, Mythological substances, Objects in Greek mythology, so understanding it makes those chapters shorter.
In everyday life
Look for Ichor outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Ichor in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Ichor means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Ichor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ichor in simple terms?

In Greek mythology, ichor () is the ethereal fluid making up the blood of the gods and/or immortals. The Ancient Greek word ἰχώρ (ikhṓr) is of uncertain etymology, and has been suggested to be a foreign word, possibly the pre-Greek substrate.

Why does Ichor matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Ichor?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Ichor.

Tags

  • Blood
  • Mythological substances
  • Objects in Greek mythology
  • Vitalism

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