Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various instruments for measuring pressure or tension.
  • n. An instrument for measuring hydrostatic pressure within the eyeball, used to detect glaucoma.
  • n. Music An instrument, such as a graduated set of tuning forks, used to determine the pitch or vibration rate of tones.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument used to measure tension or pressure

from the GNU version of the Collaborative International Dictionary of English

  • n. An instrument for determining the rate of vibrations in tones.
  • n.
  • n. An apparatus for studying and registering the action of various fluids and drugs on the excised heart of lower animals.
  • n. An instrument for measuring tension, esp. that of the eyeball.

from The Century Dictionary and Cyclopedia

  • n. An instrument for determining the degree of intravascular blood-pressure.
  • n. An instrument for measuring strains within a liquid. A thermometer with very thin elliptical bulb may be used, as the pulling forces distend the bulb, causing the mercurial column to descend.
  • n. In music, an instrument for measuring the pitch of tones; especially, a tuning-fork, or a graduated set of tuning-forks, whose pitch has been exactly determined.
  • n. In medicine, an instrument for measuring the degree of tension in the eyeball in cases of glaucoma.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. measuring instrument for measuring tension or pressure (especially for measuring intraocular pressure in testing for glaucoma)

Etymologies

Greek tonos, tension; see tone + -meter.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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