micro- prefix Meaning in Cambridge English Dictionary
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Meaning of "micro-" - English Dictionary

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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)
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