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heliometer

(hē′lē äm′ət ər)

noun

an instrument formerly used for measuring the angular distance between two stars

Origin: Fr héliomètre: see helio- & -meter: so called because orig. used in measuring the sun's diameter

See heliometer in American Heritage Dictionary 4

noun

A telescope equipped to measure small angular distances between celestial bodies.

Related Forms:

heˌli·o·metˈric (-ə-mĕtˈrĭk), heˌli·o·metˈri·cal adjective

heˌli·o·metˈri·cal·ly adverb

heˌli·omˈe·try noun

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