Heliometer

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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. Heliometric