Definition of pro-oestrus in English:

pro-oestrus

(US pro-estrus)

noun

Biology
  • The phase of the reproductive cycle in female mammals immediately preceding oestrus, characterized by the growth of ovarian follicles and development of the endometrium.

Origin

Early 20th century; earliest use found in Proceedings of the Royal Society of London. From pro- + oestrus.

Pronunciation

pro-oestrus

/prəʊˈɛstrəs//prəʊˈiːstrəs/