From The Collaborative International Dictionary of English v.0.44 [gcide]:
2. Specifically: (a) An indicator showing the depth of the water in a boiler. (b) (Elec.) A galvanometer, usually portable, for indicating the direction of a current. (c) (Elec.) Any of various devices for detecting the presence of electric waves. [Webster 1913 Suppl.]
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
26 Moby Thesaurus words for "detector": calorimeter, chemical detector, clinical thermometer, cryometer, electric thermometer, electronic counter, electronic detector, error corrector, error detector, galvanothermometer, gas thermometer, liquid-level sensor, meat thermometer, metal detector, photoelectric sorter, pyrometer, pyrometric cone, resistance pyrometer, sensor, telethermometer, temperature sensor, thermocouple, thermoelectrometer, thermometrograph, thermostat, ultrasonic detector
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