Variant: or micro-
Function: combining form
Etymology: Middle English micro-, from Latin, from Greek mikr-, mikro-, from mikros, smikros small, short; perhaps akin to Old English sm ē a l ī c careful, exquisite
1 a : small : minute < micro capsule> b : used for or involving minute quantities or variations < micro barograph>
2 : one millionth (10 -6 ) part of < micro gram>
3 a : using microscopy < micro dissection> : used in microscopy b : revealed by or having the structure discernible only by microscopic examination < micro organism>
4 : abnormally small < micro cyte>
5 : of or relating to a small area < micro climate>
6 : employed in or connected with microphotographing or microfilming < micro copy>