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Pronunciation: mi'kro


  1. Prefixes denoting smallness.
  2. Prefix used in the SI and the metric system to signify submultiples of one-millionth (10-6) of such unit.
  3. chemistry prefix to terms denoting procedures that utilize minimal quantities of the substance to be examined; a drop or two in place of 1 or more mL.
  4. Combining forms meaning microscopic; opposite of macro-, megalo-.

[G. mikros, small]

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