Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The recurrent set of physiological and behavioral changes that take place from one period of estrus to another.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physiology The repeating
physiological changes that are influenced byhormones controllingreproduction inplacental mammals other thanhuman beings and greaterapes .
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