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Thermometer :: Thermometer (n.) 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..

Celsius :: Celsius (n.) The Celsius thermometer or scale, so called from Anders Celsius, a Swedish astronomer, who invented it. It is the same as the centigrade thermometer or scale..

Bulb :: Bulb (n.) An expansion or protuberance on a stem or tube, as the bulb of a thermometer, which may be of any form, as spherical, cylindrical, curved, etc..

Reaumur :: Reaumur (n.) A Reaumur thermometer or scale.

Delicate :: Delicate (a.) Affected by slight causes; showing slight changes; as, a delicate thermometer..

Pyrometer :: Pyrometer (n.) An instrument for measuring degrees of heat above those indicated by the mercurial thermometer.

Diathermometer :: Diathermometer (n.) An instrument for examining the thermal resistance or heat-conducting power of liquids.

Sensitive :: Sensitive (a.) Having a capacity of being easily affected or moved; as, a sensitive thermometer; sensitive scales..

Sensible :: Sensible (a.) Hence: Liable to impression from without; easily affected; having nice perception or acute feeling; sensitive; also, readily moved or affected by natural agents; delicate; as, a sensible thermometer..

Telethermometer :: Telethermometer (n.) An apparatus for determining the temperature of a distant point, as by a thermoelectric circuit or otherwise..

Mercury :: Mercury (n.) A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It was named by the alchemists after the god Mercury, and designated by his symbol, /..

Aethrioscope :: Aethrioscope (n.) An instrument consisting in part of a differential thermometer. It is used for measuring changes of temperature produced by different conditions of the sky, as when clear or clouded..

Hygrodeik :: Hygrodeik (n.) A form of hygrometer having wet and dry bulb thermometers, with an adjustable index showing directly the percentage of moisture in the air, etc..

Observation :: Observation (n.) Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc..

Rise :: Rise (v.) To reach a higher level by increase of quantity or bulk; to swell; as, a river rises in its bed; the mercury rises in the thermometer..

Thermetograph :: Thermetograph (n.) A self-registering thermometer, especially one that registers the maximum and minimum during long periods..

Calibrate :: Calibrate (v. i.) To ascertain the caliber of, as of a thermometer tube; also, more generally, to determine or rectify the graduation of, as of the various standards or graduated instruments..

Graduate :: Graduate (n.) To mark with degrees; to divide into regular steps, grades, or intervals, as the scale of a thermometer, a scheme of punishment or rewards, etc..

Fahrenheit :: Fahrenheit (a.) Conforming to the scale used by Gabriel Daniel Fahrenheit in the graduation of his thermometer; of or relating to Fahrenheit's thermometric scale.

Reaumur :: Reaumur (a.) Of or pertaining to Rene Antoine Ferchault de Reaumur; conformed to the scale adopted by Reaumur in graduating the thermometer he invented.

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