Definitions

1. noun

A point in time, especially in the life of an animal, when a marked change or period of activity occurs, such as the onset of puberty or the onset of fertility.

“The climacter of her life marked the beginning of her successful career.”

2. noun

A period of time, especially in the life of an animal, when its fertility or ability to breed is at its maximum.

“The farm’s animals reached their climacter and produced numerous offspring.”