micromicro-


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mi·cro·mi·cro- (μμ),

(mī'krō-mī'krō), See usage note at micro.
Prefix formerly used to signify one trillionth (10-12); now pico-.

mi·cro·mi·cro-

Prefix formerly used to signify one trillionth (10-12); replaced by pico-.
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