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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.

Same as Antihelix.

The curved elevation of the cartilage of the ear, within or in front of the helix. See Ear.

Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring. -- Hel"i*cal*ly, adv.

Having the form of a helix; spiral.

ed as a white crystalline substance by partial oxidation of salicin, from a willow (Salix Helix of Linnæus.)

oil, an apparatus producing induced currents of great intensity. It consists of a coil or helix of stout insulated copper wire, surrounded by another coil of very fine insulated wire, in which a momentary current is induced, when a current (as from a voltaic battery), passing through the inner coil, is made, broken, or…

A plant of the genus Hedera (H. helix), common in Europe. Its leaves are evergreen, dark, smooth, shining, and mostly five-pointed; the flowers yellowish and small; the berries black or yellow. The stem clings to walls and trees by rootlike fibers. Direct The clasping ivy where to climb. Milton. Ye myrtles brown, with…

nd snails of warm countries are Dioecia, and belong to the Tænioglossa. See Geophila, and Helix. -- Land spout, a descent of cloud and water in a conical form during the occurrence of a tornado and heavy rainfall on land. -- Land steward, a person who acts for another in the management of land, collection of rents, e…

te gastropods, in which the mantle cavity is modified into an air- breathing organ, as in Helix, or land snails, Limax, or garden slugs, and many pond snails, as Limnæa and Planorbis.

ny one of numerous species of terrestrial air-breathing gastropods belonging to the genus Helix and many allied genera of the family Helicidæ. They are abundant in nearly all parts of the world except the arctic regions, and feed almost entirely on vegetation; a land sanil.

spiral lines of growth. -- Spiral shell, any shell in which the whorls form a spiral or helix. -- Spiral spring. See the Note under Spring, n., 4.

allied genera, in which the long calcareous supports of the arms form a large spiral, or helix, on each side.

Coiled into the shape of a screw or a helix.

To follow a helical or spiral course; to be in the form of a helix.

cale, is a feature in the Corinthian and Composite capitals. See Illust. of Capital, also Helix, and Stale.