From bootlegbooks Reference Webster 1913:
Poikilocyte
(Poi"ki*lo*cyte) n. [Gr. poiki`los diversified, changeable + ky`tos hollow vessel.] (Physiol.) An irregular form of corpuscle
found in the blood in cases of profound anĉmia, probably a degenerated red blood corpuscle.

Poikilothermal
(Poi`ki*lo*ther"mal) Poikilothermic
(Poi`ki*lo*ther"mic) a. [Gr. poiki`los changeable + E. thermal, thermic.] (Physiol.) Having a varying body temperature.
See Homoiothermal.