ectotherm

ectotherm

CEFR: C1-C2 /ec-totherm/ [no ipa available]

Ectotherms are animals depending mainly on external heat sources, and their body temperature changes with the temperature of the environment. The adjective is ectothermic

Example Sentences:
Because reptiles are ectothermic, the embryos of live-bearing females and the eggs of oviparous females deposited in the soil or other locations are subject to fluctuating temperatures.
Tortoises are ectotherms because they rely on the environment to sustain their body temperature.