Skip to Content


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]

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.