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

Fly Your Flag contestant rules and eligibility Fly Your Flag contestants MUST be middle or high school students at a public, independent, charter, home, religious, or micro school and be in grades 5 through 12. —USA Today, 6 Apr. 2026

Tracking top Wall Street analysts can help investors gain key insights, as these experts assign ratings after thoroughly analyzing a company’s fundamentals and the macro and micro factors impacting its performance. —Tipranks.com Staff, CNBC, 5 Apr. 2026

On board is a micro rover built by ispace called Tenacious as well as several commercial payloads. —Richard Tribou, The Orlando Sentinel, 4 Apr. 2026

Kronos micro nuclear reactor for practical applications NANO Nuclear focuses on creating scalable reactors for practical applications. —Aman Tripathi, Interesting Engineering, 3 Apr. 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