adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A cold-blooded animal.
2. 2
   an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals wordnet

Adjective

1. 1
   Cold-blooded.

Synonyms

All synonyms

ectothermcold bloodedectothermicpoikilothermicpoikilothermic

Antonyms

All antonyms

warm bloodedendothermichomeothermichomoeothermic

Etymology

From poikilo- + -therm.

Related phrases

cold blooded

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.