• WordNet 3.6
    • n tonometer measuring instrument for measuring tension or pressure (especially for measuring intraocular pressure in testing for glaucoma)
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Webster's Revised Unabridged Dictionary
    • Tonometer (Physiol) An apparatus for studying and registering the action of various fluids and drugs on the excised heart of lower animals.
    • Tonometer (Physics) An instrument for determining the rate of vibrations in tones.
    • Tonometer (Physiol) An instrument for measuring tension, esp. that of the eyeball.
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Century Dictionary and Cyclopedia
    • n tonometer An instrument for determining the degree of intravascular blood-pressure.
    • n tonometer 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 tonometer 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. The term is used specifically for an exceptionally perfect set of forks prepared by Scheibler about 1833 for the establishment of a standard scale.
    • n tonometer In medicine, an instrument for measuring the degree of tension in the eyeball in cases of glaucoma.
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Webster's Revised Unabridged Dictionary
Gr. a stretching, a tone + -meter,


In literature:

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

In news:

Tonometer provides comfort and quick and accurate pressure readings.
Applanation tonometer boosts practice efficiency.
Gilger relayed that veterinarians should diagnose glaucoma using an instrument called a tonometer, which measures intraocular pressure.