monestrous

[ mon-es-truh s ]
/ mɒnˈɛs trəs /

adjective

of or relating to a mammal that has one estrus period per breeding season, as the dog.

Origin of monestrous

First recorded in 1895–1900; mon- + estrous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019