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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.
- English Word Heliotype Definition A picture obtained by the process of heliotypy.
- English Word Heliotypic Definition Relating to, or obtained by, heliotypy.
- English Word Heliotypy Definition A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.
- English Word Heliozoa Definition An order of fresh-water rhizopods having a more or less globular form, with slender radiating pseudopodia; the sun animalcule.
- English Word Helispheric Definition Alt. of Helispherical
- English Word Helispherical Definition Spiral.
- English Word Helium Definition A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.
- English Word Helix Definition A nonplane curve whose tangents are all equally inclined to a given plane. The common helix is the curve formed by the thread of the ordinary screw. It is distinguished from the spiral, all the convolutions of which are in the plane.
- English Word Helix Definition A caulicule or little volute under the abacus of the Corinthian capital.
- English Word Helix Definition The incurved margin or rim of the external ear. See Illust. of Ear.