名詞 estrus:

1. applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
   同義詞：oestrus, heat, rut

estrus 也作 oes.trus

n.（名詞）
The periodic state of sexual excitement in the female of most mammals, excluding human beings, that immediately precedes ovulation and during which the female is most receptive to mating; heat.
（雌性動物的）動情，動情周期：大多數哺乳動物（包括人類）的雌性產生的周期性的性沖動，在此期間內雌性具有排卵的優(yōu)勢，所以該期間最適合性交；刺激

來源：
New Latin
現代拉丁語
from Latin oestrus [frenzy, gadfly]
源自 拉丁語 oestrus [狂亂，狂熱，游蕩的]
from Greek oistros * see eis-
源自 希臘語 oistros *參見 eis-