| 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). |
| micro- or micr- pref.
[Greek mīkro-, from mīkros, small.] |
micro- or micr-
pref.
Small: microblast.
Abnormally small: microcephaly.
Requiring or involving microscopy: microsurgery.
Symbol μ One-millionth (10-6): microliter.
micro-
prefix