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estrual

American

[es-troo-uhl] / ˈɛs tru əl /

adjective

Zoology.

an uncommon variant of estrous.

Etymology

Origin of estrual

First recorded in 1890–95

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.