Standard Lemma guide

poikilotherm

adj · noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adj

Meaning 1

Cold-blooded.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: poikilothermic, ectothermic

Antonyms: endothermic, homeothermic, homoeothermic, homoiothermic, homothermic

2

noun

Meaning 2

A cold-blooded animal.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: ectotherm

Antonyms: endotherm, homeotherm, homoeotherm, homoiotherm, homotherm

3

noun

Meaning 3

an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: ectotherm

Antonyms: none provided

Broader terms: animal, animate being, beast, brute, creature, fauna

History

Etymology

From poikilo- + -therm.

Across languages

Translations

4 source translations are retained for this English entry.

  • German: poikilotherm — Ecology: animals with unconstant body temperature
  • Japanese: 変温動物 (hen'ondōbutsu) — Ecology: animals with unconstant body temperature
  • Portuguese: poiquilotérmico — Ecology: animals with unconstant body temperature
  • Volapük: cenavamik — Ecology: animals with unconstant body temperature