ectotherm
ec·tot·herm
noun
1.
an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals
Origin
From ecto- + -therm.
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.