estrus

es·trus

noun \ˈes-trəs\

Definition of ESTRUS

1

a : a regularly recurrent state of sexual excitability during which the female of most mammals will accept the male and is capable of conceiving : heat b : a single occurrence of this state

2

: estrous cycle

Variants of ESTRUS

es·trus or es·trum \-trəm\ or chiefly British oes·trus \ˈē-strəs\ or oes·trum \ˈē-strəm\