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estrange
estranged
estreat
estriol
estrogen
estrogen-replacement therapy
estrone
estrous
estrous cycle
estrus
estuarine
estuary
Estuary English
esu
esurient
esusu
-et
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estrous cycle
es·trous cy·cle


noun 
Definition:
 
female reproductive cycle in mammals: a hormonally controlled reproductive cycle occurring in many female mammals, marked by a period of sexual activity, ovulation, and changes in the womb lining
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