estruation


estrus

 [es´trus] the recurrent, restricted period of sexual receptivity in female mammals other than human females, marked by intense sexual urge. See also cycle" >estrous cycle. Called also estruation, estrum, and heat. adj., adj es´trual, es´trous.

es·trus

(es'trŭs) That portion or phase of the sexual cycle of female animals characterized by willingness to permit coitus; readily detectable behavioral and other signs are exhibited by animals during this period.
Synonym(s): estruation, heat (2) , oestrus.
[G. oistros, mad desire]

estruation

(ĕs″troo-ā′shŭn) The sexually fertile period in female mammals. In lay terminology, the period of heat.