micro

adjective

1. extremely small.
2. minute in scope or capability.
3. of or relating to microcomputers.
4. of or relating to microeconomics.

noun, plural mi·cros.

5. anything extremely small in scope or capability.
6. a microcomputer.
7. microeconomics.

1. 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).

adjective

1. very small

noun plural -cros

2. short for microcomputer, microlepidoptera, microprocessor, microwave oven

combining form

1. small or minutemicrospore
2. involving the use of a microscopemicrography
3. indicating a method or instrument for dealing with small quantitiesmicrometer
4. (in pathology) indicating abnormal smallness or underdevelopmentmicrocephaly; microcyte Compare macro- (def. 2)
5. 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.

1. Small:microblast.
2. Abnormally small:microcephaly.
3. Requiring or involving microscopy:microsurgery.
4. One-millionth (10-6):microliter.

1. A prefix that means: “small” (as in microorganism) or “one millionth” (as in microsecond).