Dictionary.com

microevolution

[ mahy-kroh-ev-uh-loo-shuhn or, especially British, -ee-vuh- ]
/ ˌmaɪ kroʊˌɛv əˈlu ʃən or, especially British, -ˌi və- /
Save This Word!

noun Biology.
evolutionary change involving the gradual accumulation of mutations leading to new varieties within a species.
minor evolutionary change observed over a short period of time.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of microevolution

First recorded in 1935–40; micro- + evolution

OTHER WORDS FROM microevolution

mi·cro·ev·o·lu·tion·ar·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use microevolution in a sentence

Scientific definitions for microevolution

microevolution
[ mī′krō-ĕv′ə-lōōshən ]

Evolutionary change below the level of the species, resulting from relatively small genetic variations. Microevolution produces new strains of microorganisms, for example, or the rise of a new subspecies. The accumulation of many microevolutionary changes results in macroevolution.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK