Prefix, meaning minutely (e.g. microvesiculate, with minute vesicles).
Prefix for units of measurement, one millionth part (i.e. 10-6); symbol μ (or sometimes me).
In sociology, a level of analysis that searches for relationships within a single institution or within the smaller segments of society sociologists are chiefly concerned with the psychology of the situation rather than the anthropological aspects, macro.