Heliometer

He`li*om"e*ter

(?), n. [Helio- + -meter: cf. F. hliomtre.] (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.

{

He`li*o*met"ric

(?),

He`li*o*met"ric*al

(?), } a. Of or pertaining to the heliometer, or to heliometry.
[1913 Webster]

 

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Tue 02nd September 2014