ultramicrotome: Meaning and Definition of

ul•tra•mi•cro•tome

Pronunciation: (ul"tru-mī'kru-tōm"), [key]
— n. Histol.
  1. a microtome capable of producing very fine slices of tissue or cellular specimens for electron microscopic examination.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.