a series of physiological changes in sexual and other organs in female mammals, extending from one period of heat to the next, accompanied by behavioral changes indicating interest in mating.
Exercise Caution With These Telltale IdiomsThe following idioms are helpful reminders to assess your circumstances and decide when to make a change.
Why Did “Noon” Used To Mean 3:00? To most, the word noon signifies a specific time of day–namely, 12:00 midday, a.k.a. “lunchtime.” The counterweight to 12:00 midnight. But, surprisingly, the term noon wasn’t always shorthand for midday at 12:00; in fact, it used to refer to a different time of day altogether. First, some essential background. Clocks and watches are relatively new inventions. Though some timekeeping devices, like sundials and water clocks, …
Origin of estrous cycle
First recorded in 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Medicine definitions for estrous cycle
The recurrent set of physiological and behavioral changes that take place from one period of estrus to another.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for estrous cycle
[ ĕs′trəs ]
The series of changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during the period known as the breeding season, which ensures that young are born at a time when the chance of survival is greatest. The length of the cycle varies from species to species.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.