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-.

micromicro-

prefix meaning "10-12" (μμ): micromicron.

mi·cro·mi·cro-

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

micromicro-

word element designating 10−12 (one-million-millionth) part of the unit to which it is joined; now supplanted by the prefix pico-.
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