Definition of poikilosmotic in US English:

poikilosmotic

(also poikilo-osmotic)

adjective

Zoology
  • Of an animal: that allows the concentration of dissolved substances in its body fluids to vary with fluctuations in that of the surrounding medium. Opposed to homoiosmotic.

Origin

Early 20th century; earliest use found in The Biological Bulletin. From poikilo- + osmotic, after German poikilosmotisch.

Pronunciation

poikilosmotic

/ˌpɔɪkɪlɒzˈmɒtɪk/