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heliometer

[hee-lee-om-i-ter] /ˌhi liˈɒm ɪ tər/
noun
1.
a telescope with a divided, adjustable objective, formerly used to measure small angular distances, as those between celestial bodies.
Origin
1745-1755
1745-55; helio- + -meter
Related forms
heliometric
[hee-lee-uh-me-trik] /ˌhi li əˈmɛ trɪk/ (Show IPA),
heliometrical, adjective
heliometrically, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for heliometrical

heliometer

/ˌhiːlɪˈɒmɪtə/
noun
1.
a refracting telescope having a split objective lens that is used to determine very small angular distances between celestial bodies
Derived Forms
heliometric (ˌhiːlɪəʊˈmɛtrɪk), heliometrical, adjective
heliometrically, adverb
heliometry, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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