Definition of micro
1 : very small; especially : microscopic
2 : involving minute quantities or variations
From the M-W Editors
Origin and Etymology of micro
micr-
First Known Use: 1923
1971
First Known Use of micro
1971
Medical Dictionary
micro
play
adjective
mi·cro
\ˈmī-(ˌ)krō\
Medical Definition of micro
1: very small; especially : microscopic
2involving minute quantities or variations
Learn More about micro
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Spanish Central: Translation of micro Britannica English: Translation of micro for Arabic speakers
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