A microtome used in cutting sections 0.1 um thick, or less, for electron microscopy. ... (05 Mar 2000) ... 
Type: Term Pronunciation: ŭl′tră-mī′krō-tōm Definitions: 1. A microtome used in cutting sections 0.1 mcm thick, or less, for electron microscopy.
a device that cuts thin sections for electron microscopy
a microtome capable of producing very fine slices of tissue or cellular specimens for electron microscopic examination.