heliometer noun. [hi:lɪ'ɒmɪtǝ] M18.
[from HELIO- + -METER.]
Astronomy. A refracting telescope with a split objective lens, used to measure angular distances between stars etc. (orig. to measure the sun's apparent diameter).

■ helio'metric,

■ helio'metrical adjectives L19.

■ helio'metrically adverb L19.

■ heliometry noun L19.

[TahlilGaran] English Dictionary ▲