monestrous

1. (biology) Of or pertaining to a mammal, such as the dog, that only enters into heat once during each of its normal breeding cycles.Examples: "The dog, wolf, and fox are monestrous, the fox and wolf having one and the dog two cycles in a year."; "Males of monestrous species also exhibit a cycle, being sexually active only during the females' estrus."; "Most wild carnivorous mammals are monestrous."not-comparable