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

Their experiments covered micro-LED diameters ranging from 100 micrometers down to just 2 micrometers. — Aamir Khollam, Interesting Engineering, 30 Oct. 2026

For brands, that means relevance may come less from chasing micro trends and more from making room for distinct communities and creative voices. — Denni Hu, Footwear News, 30 Oct. 2026

And there’s going to be a lot of forms of content, whether that’s TV, movies, social--blogs in the early 2000s, and now there’s micro dramas. — Washington Post Staff, Washington Post, 29 Oct. 2026

Unlike older laser skin treatments that essentially remove the top layer of a patient's skin, Fraxel lasers keep most of the epidermis intact while delivering laser energy through the skin's micro thermal zones. — Norah O'Donnell, CBS News, 28 Oct. 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