micro- prefix definition, meaning - what is micro- prefix in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “micro-”

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micro-

prefix uk   /maɪ.krəʊ-/ /-rə-/  us   /-kroʊ-/

micro- prefix (SMALL)

micro- prefix (MEASUREMENT)

0.000 001 or one millionth of the stated unit: a micrometre a microgram
(Definition of micro- prefix from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of micro-?
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