noun Date: 1900 the correlated phenomena of the endocrine and reproductive systems of a female mammal from the beginning of one period of estrus to the beginning of the next
ESTROUS CYCLE
Meaning of ESTROUS CYCLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012