micro

1 of 3

adjective

mi·​cro ˈmī-(ˌ)krō 

1

: very small

especially : microscopic

2

: involving minute quantities or variations

micro

2 of 3

noun

plural micros

1

: microcomputer

2

: microprocessor

micro-

3 of 3

combining form

see micr-

Examples of micro in a Sentence

Recent Examples on the Web

Adjective

Its other features include a micro-mesh lining, an adjustable drawstring waist, and two side pockets. — Eric Twardzik, Robb Report, 10 Aug. 2026

The doctor uses a micro-punch tool to extract these grafts one by one. — Connie Etemadi, USA Today, 10 Aug. 2026

There are scanning systems, raster scanning systems, and there are spinning mirrors, and there are micro—there are MEMS devices. — Joel Feder, The Drive, 5 Aug. 2026

Best mascara This mascara uses a brush with nearly 500 micro bristles to coat and lift every lash without clumping or smudging. — Casey Delbasso, ABC News, 31 July 2026

Word History

Etymology

Adjective

independent use of micro-

Noun

by shortening

First Known Use

Adjective

1923, in the meaning defined at sense 1

Noun

1971, in the meaning defined at sense 1

Phrases Containing micro

• micro-dose
• micro-dosing
• micro-grid
• micro-inverter
• micro-mobility
• micro-RNA

Rhymes for micro

• acknow
• aglow
• ago
• airglow
• aloe
• altho
• although
• ammo
• backflow
• backhoe
• banjo
• barbeau

Kids Definition

micro

adjective

mi·​cro

ˈmī-krō

: microscopic sense 3

Medical Definition

micro

adjective

mi·​cro ˈmī-(ˌ)krō 

1

: very small

especially : microscopic

2

involving minute quantities or variations