- a combining form with the meanings “small” (microcosm; microgamete), “very small in comparison with others of its kind” (microcassette; microlith), “too small to be seen by the unaided eye” (microfossil; microorganism), “dealing with extremely minute organisms, organic structures, or quantities of a substance” (microdissection; microscope), “localized, restricted in scope or area” (microburst; microhabitat), “(of a discipline) focusing on a restricted area” (microeconomics), “containing or dealing with texts that require enlargement to be read” (microfilm; microreader), “one millionth” (microgram).
- small or minutemicrospore
- involving the use of a microscopemicrography
- indicating a method or instrument for dealing with small quantitiesmicrometer
- (in pathology) indicating abnormal smallness or underdevelopmentmicrocephaly; microcyte Compare macro- (def. 2)
- denoting 10 –6microsecond Symbol: μ
word-forming element meaning “small, microscopic; magnifying; one millionth,” from Latinized comb. form of Greek mikros “small, little, petty, trivial, slight” (see mica). pref.
- Abnormally small:microcephaly.
- Requiring or involving microscopy:microsurgery.
- One-millionth (10-6):microliter.
- A prefix that means: small (as in microorganism) or one millionth (as in microsecond).