anestrus

especially British, an·oes·trus

[an-es-truhs]

noun

Zoology.

1. (in some female mammals) the interval of sexual inactivity between two breeding cycles.

anestrus

/ ænˈiːstrəs /

noun

1. a variant spelling (esp US) of anoestrus

Other Word Forms

• anestrous adjective

Word History and Origins

Origin of anestrus¹

First recorded in 1925–30; an- ¹ + estrus