Anestrous and Estrous

Anestrous

Anestrous adjective - (of lower mammals) not in a state of estrus; not in heat.
Usage example: an anestrous bitch
Show all Definitions
Synonyms for Anestrous

Estrous is an antonym for anestrous.

Estrous

Estrous adjective - (of lower mammals) showing or in a state of estrus; in heat.
Usage example: the estrous cycle
Show all Definitions
Synonyms for Estrous

Anestrous is an antonym for estrous.
Cite this Source
Estrous and Anestrous. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/anestrous/estrous
Anestrous & Estrous. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/anestrous/estrous>.
Estrous or Anestrous. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/anestrous/estrous.
Google Ngram Viewer shows how "anestrous" and "estrous" have occurred on timeline