or micro- combining form Etymology: Middle English micro-, from Latin, from Greek mikr-, mikro-, from mikros, smikros small, short; perhaps akin to Old English smēalīc careful, exquisite 1. a. small; minute Example: microcapsule b. used for or involving minute quantities or variations Example: microbarograph 2. one millionth (10-6) part of Example: microgram 3. a. using microscopy Example: microdissection; used in microscopy b. revealed by or having the structure discernible only by microscopic examination Example: microorganism 4. abnormally small Example: microcyte 5. of or relating to a small area Example: microclimate 6. employed in or connected with microphotographing or microfilming Example: microcopy