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Meaning of rotameter

ro•tam•e•ter

Pronunciation: (rō-tam'i-tur, rō'tu-mē"-), [key]
— n.
  1. 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.