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definitions

tonometer

[toh-nom-i-ter]
noun
  1. an instrument for measuring the frequencies of tones, as a tuning fork or a graduated set of tuning forks.
  2. any of various physiological instruments for measuring intraocular pressure or blood pressure.
  3. Physical Chemistry. an instrument for measuring vapor pressure.

Origin of tonometer

First recorded in 1715–25; tono- + -meter
Related formston·o·met·ric [ton-uh-me-trik, toh-nuh-] /ˌtɒn əˈmɛ trɪk, ˌtoʊ nə-/, adjectiveto·nom·e·try, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for tonometer

Historical Examples of tonometer

  • The (Schiotz) tonometer was used daily for 70 consecutive days and never registered more than 12-14 mm.

    Glaucoma

    Various

British Dictionary definitions for tonometer

tonometer

noun
  1. an instrument for measuring the pitch of a sound, esp one consisting of a set of tuning forks
  2. any of various types of instrument for measuring pressure or tension, such as the blood pressure, vapour pressure, etc
Derived Formstonometric (ˌtɒnəˈmɛtrɪk, ˌtəʊ-), adjectivetonometry, noun

Word Origin for tonometer

C18: from Greek tonos tone + -meter
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
tonometer in Medicine

tonometer

[tō-nŏm′ĭ-tər]
n.
  1. Any of various instruments for measuring pressure or tension, especially one used in tonography.
Related formsto′no•met′ric (tō′nə-mĕt′rĭk) adj.to•nom′e•try n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.