/ Dictionary / Index R rotameter: Meaning and Definition of Find definitions for: ro•tam•e•ter Pronunciation: (rō-tam'i-tur, rō'tu-mē"-), [key] — n. an instrument for measuring the rate of flow of a liquid, consisting of a tapered vertical tube in which a small float is forced upward until its weight balances the fluid force. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rota Rotarian Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language