Dictionary.com
definitions

flowmeter

[floh-mee-ter]
noun
  1. an instrument for measuring the flow rate of a fluid in a pipe.

Origin of flowmeter

First recorded in 1915–20; flow + -meter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for flowmeter

flowmeter

noun
  1. an instrument that measures the rate of flow of a liquid or gas within a pipe or tube
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
flowmeter in Medicine

flowmeter

[flō′mē′-tər]
n.
  1. An instrument for monitoring, measuring, or recording the rate of flow, pressure, or discharge of liquids or gases.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.