Cold-blooded and Poikilothermous

Cold-blooded adjective - Having cold blood (in animals whose body temperature is not internally regulated).

Poikilothermous and cold-blooded are semantically related. In some cases you can use "Poikilothermous" instead an adjective phrase "Cold-blooded".

Poikilothermous adjective - Of animals except birds and mammals; having body temperature that varies with the environment.

Cold-blooded and poikilothermous are semantically related. You can use "Cold-blooded" instead an adjective "Poikilothermous".