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- English Word Heliographic Definition Of or pertaining to heliography or a heliograph; made by heliography.
- English Word Heliography Definition Photography.
- English Word Heliogravure Definition The process of photographic engraving.
- English Word Heliolater Definition A worshiper of the sun.
- English Word Heliolatry Definition Sun worship. See Sabianism.
- English Word Heliolite Definition A fossil coral of the genus Heliolites, having twelve-rayed cells. It is found in the Silurian rocks.
- English Word Heliometer Definition 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.
- English Word Heliometric Definition Alt. of Heliometrical
- English Word Heliometrical Definition Of or pertaining to the heliometer, or to heliometry.
- English Word Heliometry Definition The apart or practice of measuring the diameters of heavenly bodies, their relative distances, etc. See Heliometer.
- English Word Heliopora Definition An East Indian stony coral now known to belong to the Alcyonaria; -- called also blue coral.
- English Word Helioscope Definition 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.
- English Word Heliostat Definition 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.
- English Word Heliotrope Definition An instrument or machine for showing when the sun arrived at the tropics and equinoctial line.
- English Word Heliotrope Definition A plant of the genus Heliotropium; -- called also turnsole and girasole. H. Peruvianum is the commonly cultivated species with fragrant flowers.
- English Word Heliotrope Definition An instrument for making signals to an observer at a distance, by means of the sun's rays thrown from a mirror.
- English Word Heliotrope Definition See Bloodstone (a).
- English Word Heliotroper Definition The person at a geodetic station who has charge of the heliotrope.
- English Word Heliotropic Definition Manifesting heliotropism; turning toward the sun.
- English Word Heliotropism Definition The phenomenon of turning toward the light, seen in many leaves and flowers.