Definition of thermometer :
An instrument for measuring temperature, founded on the principle that changes of temperature in bodies are accompained by proportional changes in their volumes or dimensions.
thermometer (part of speech: noun)
- There was a thermometer which used liquid such as water or alcohol in a glass tube instead of air. - "Our Legal Heritage, 4th Ed.", S. A. Reilly.
- At six o'clock the thermometer marked seven degrees above zero. - "The Lost Child 1894", FranÃ§ois Edouard Joachim CoppÃ©e.
- 2. Wet the bulb of a thermometer with alcohol or water. - "Physiology and Hygiene for Secondary Schools", Francis M. Walters, A.M..