A period of sexual quiescence intervening between two periods of estrus. [G. dia, between, + oistros, desire]
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di·es·trus (')dī-'es-trəs also di·es·trum -trəm or chiefly Brit di·oes·trus also di·oes·trum -'ēs- n a period of sexual quiescence that intervenes between two periods of estrus
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di·es·trus (di-esґtrəs) 1. in female mammals that have estrous cycles, a period of sexual quiescence between metestrus and the next proestrus; it represents the phase of the mature corpus luteum. 2. anestrus (def. 2). Called also diestrum.Medical dictionary. 2011.