an instrument for measuring temperature, often a sealed glass tube that contains a column of liquid, as mercury, that expands and contracts, or rises and falls, with temperature changes, the temperature being read where the top of the column coincides with a calibrated scale marked on the tube or its frame.

1615–25; thermo- + -meter

thermometric [thur-muh-me-trik] , thermometrical, adjective
thermometrically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To thermometrically
World English Dictionary
thermometer (θəˈmɒmɪtə)
clinical thermometer gas thermometer resistance thermometer thermocouple See also pyrometer an instrument used to measure temperature, esp one in which a thin column of liquid, such as mercury, expands and contracts within a graduated sealed tube

thermometry (θəˈmɒmɪtrɪ)
the branch of physics concerned with the measurement of temperature and the design and use of thermometers and pyrometers

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

1633, from Fr. thermomètre (1624), coined by Jesuit Father Leuréchon from Gk. thermos "hot" (see thermal) + metron "measure" (see meter (2)). An earlier, Latinate form was thermoscopium (1617). The earliest such device was Galileo's air-thermometer, invented c.1597.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

thermometer ther·mom·e·ter (thər-mŏm'ĭ-tər)
An instrument for measuring temperature.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
thermometer   (thər-mŏm'ĭ-tər)  Pronunciation Key 
An instrument used to measure temperature. There are many types of thermometers; the most common consist of a closed, graduated glass tube in which a liquid expands or contracts as the temperature increases or decreases. Other types of thermometers work by detecting changes in the volume or pressure of an enclosed gas or by registering thermoelectric changes in a conductor (such as a thermistor or thermocouple).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Related Words
Copyright © 2014, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature