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A picture obtained by the process of heliotypy.

Relating to, or obtained by, heliotypy.

A method of transferring pictures from photographic negatives to hardened gelatin plates from which impressions are produced on paper as by lithography.

water rhizopods having a more or less globular form, with slender radiating pseudopodia; the sun animalcule.

Spiral. Helispherical line (Math.). the rhomb line in navigation. [R.]

A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.

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.

The place of the dead, or of souls after death; the grave; -- called in Hebrew sheol, and by the Greeks hades. He descended into hell. Book of Common Prayer. Thou wilt not leave my soul in hell. Ps. xvi. 10.

A witch; a hag. Middleton.

The dabchick.

Haunted by devils; hellish. Dryden.

A judge or umpire in games or combats.

A large North American aquatic salamander (Protonopsis horrida or Menopoma Alleghaniensis). It is very voracious and very tenacious of life. Also called alligator, and water dog.

Born in or of hell. Shak.

Produced in hell. Spenser.

Prepared in hell. Milton.

A composition for infernal purposes; a magical preparation. Shak.

Doomed to hell. Milton.

A genus of perennial herbs (Helleborus) of the Crowfoot family, mostly having powerfully cathartic and even poisonous qualities. H. niger is the European black hellebore, or Christmas rose, blossoming in winter or earliest spring. H. officinalis was the officinal hellebore of the ancients.

A poisonous glucoside accompanying helleborin in several species of hellebore, and extracted as a white crystalline substance with a bittersweet taste. It has a strong action on the heart, resembling digitalin.