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]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "ichor":
   Rh factor, Rh-negative, Rh-positive, Rh-type, Rhesus factor,
   antibody, antigen, arterial blood, blood, blood bank, blood cell,
   blood count, blood donor, blood donor center, blood group,
   blood grouping, blood picture, blood platelet, blood pressure,
   blood serum, blood substitute, bloodmobile, bloodstream, chyle,
   circulation, clinical dextran, colostrum, dextran, discharge,
   erythrocyte, festering, gleet, globulin, gore, grume, hematics,
   hematologist, hematology, hematoscope, hematoscopy, hemocyte,
   hemoglobin, hemometer, humor, isoantibody, lachryma, lactation,
   leukocyte, leukorrhea, lifeblood, lymph, matter, mattering, milk,
   mucor, mucus, neutrophil, opsonin, peccant humor, phagocyte,
   phlegm, plasma, plasma substitute, purulence, pus, rankling,
   red corpuscle, rheum, running, saliva, sanies, serous fluid, serum,
   snot, suppuration, sweat, tear, teardrop, the whites, type O,
   urine, venous blood, white corpuscle



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