HELIOLITE
He"li*o*lite, n. Etym: [Helio- + -lite.] (Paleon.)
Defn: A fossil coral of the genus Heliolites, having twelve-rayed cells. It is found in the Silurian rocks.
HELIOMETER
He`li*om"e*ter, n. Etym: [Helio- + -meter: cf. F. héliomètre.]
(Astron.)
Defn: 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; HELIOMETRICAL
He`li*o*met"ric, He`li*o*met"ric*al, a.
Defn: Of or pertaining to the heliometer, or to heliometry.
HELIOMETRY
He`li*om"e*try, n.
Defn: The apart or practice of measuring the diameters of heavenly bodies, their relative distances, etc. See Heliometer.
HELIOPORA
He`li*op"o*ra, n. Etym: [NL., fr. Gr. (Zoöl.)
Defn: An East Indian stony coral now known to belong to the
Alcyonaria; — called also blue coral.