The Collaborative International Dictionary of English v.0.48:

Ichor \I"chor\, n. [NL., fr. Gr. 'ichw`r: cf. F. ichor.]
   1. (Class. Myth.) An ethereal fluid that supplied the place
      of blood in the veins of the gods.
      [1913 Webster]

   2. A thin, acrid, watery discharge from an ulcer, wound, etc.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ichor
    n 1: (Greek mythology) the rarified fluid said to flow in the
         veins of the Gods
    2: a fluid product of inflammation [syn: pus, purulence,
       suppuration, ichor, sanies, festering]

The Devil's Dictionary (1881-1906):

ICHOR, n.  A fluid that serves the gods and goddesses in place of
blood.

    Fair Venus, speared by Diomed,
    Restrained the raging chief and said:
    "Behold, rash mortal, whom you've bled --
    Your soul's stained white with ichorshed!"
                                                             Mary Doke