Heliography
(He`li*og"ra*phy) n. [Helio- + -graphy.] Photography. R. Hunt.
Heliogravure
(He`li*o*grav"ure) n. [F. héliogravure.] The process of photographic engraving.
Heliolater
(He`li*ol"a*ter) n. [Helio- + Gr. servant, worshiper.] A worshiper of the sun.
Heliolatry
(He`li*ol"a*try) n. [Helio- + Gr. service, worship.] Sun worship. See Sabianism.
Heliolite
(He"li*o*lite) n. [Helio- + -lite.] (Paleon.) 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. [Helio- + -meter: cf. F. héliomètre.] (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
(He`li*o*met"ric He`li*o*met"ric*al) a. Of or pertaining to the heliometer, or to heliometry.
Heliometry
(He`li*om"e*try) n. The apart or practice of measuring the diameters of heavenly bodies,
their relative distances, etc. See Heliometer.
Heliopora
(||He`li*op"o*ra) n. [NL., fr. Gr. the sun + a passage, pore.] (Zoöl.) An East Indian stony
coral now known to belong to the Alcyonaria; — called also blue coral.
Helioscope
(He"li*o*scope) n. [Helio- + -scope: cf. F. hélioscope.] (Astron.) A telescope or instrument
for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect
but a small portion of light. — He`li*o*scop`ic a.
Heliostat
(He"li*o*stat) n. [Helio- + Gr. placed, standing, fr. to place, stand: cf. F. héliostate.] An instrument
consisting of a mirror moved by clockwork, by which a sunbeam is made apparently stationary, by being
steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope.
Heliotrope
(He"li*o*trope) n. [F. héliotrope, L. heliotropium, Gr. the sun + to turn, turn. See Heliacal,
Trope.]
1. (Anc. Astron.) An instrument or machine for showing when the sun arrived at the tropics and equinoctial
line.
2. (Bot.) A plant of the genus Heliotropium; — called also turnsole and girasole. H. Peruvianum is
the commonly cultivated species with fragrant flowers.
