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heliometer |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Heliometer \He`li*om"e*ter\, n. [Helio- + -meter: cf F. h['e]liom[`e]tre.] (Astron.) An instrument devised originally for measuring the diameter of the sun; now employed for delicate measurements of the distance and relative direction of two stars too far apart to be easily measured in the field of view of an ordinary telescope.
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