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A period of sexual quiescence intervening between two periods of estrus.
[G. dia, between, + oistros, desire]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
dioestrusthe sexually inactive period in animals which possess more than one period of sexual activity (heat) per year.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005