ichor

Meaning

1. The liquid said to flow in place of blood in the veins of the gods.
2. The blood of human beings or animals; also (obsolete) the clear, fluid portion of blood; blood plasma, plasma.
3. A blood-like fluid.
4. A fluid believed to seep out from magma and cause rock to turn into granite.
5. (obsolete) A fetid, watery discharge from a sore; pus.

Synonyms

pus

suppuration

sanies

festering

purulence

sloppy

wet

gleet

yellow bile

atter

Pronounced as (IPA)

/ˈaɪkɔː/

Etymology

Inherited from Middle English: icor

In summary

Sense 1 (“liquid said to flow in place of blood in the veins of the gods”) is borrowed from Medieval Latin ichor, from Ancient Greek ῑ̓χώρ (īkhṓr, “fluid running through the veins of gods, ichor; watery part of blood, lymph, serum; watery part of milk, whey; gravy; pus; naphtha”); further etymology unknown, probably from Pre-Greek.
Sense 2.4 (“fetid, watery discharge from a sore”) is from Middle English icor, icore [and other forms], from Medieval Latin ichor; see further above.