‖n.; pl. Cheliceræ [ NL., fr. Gr. chhlh` claw + ke`ras horn. ] (Zool.) One of the anterior pair of mouth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects. [ 1913 Webster ]

adj. having chelicerae. [ WordNet 1.5 ]

a. [ See Gael. ] Of, belonging to, or designating, that division of the Celtic languages which includes the Irish, Gaelic, and Manx. [ Webster 1913 Suppl. ]

a. [ From Helix. ] Of or pertaining to, or in the form of, a helix; spiral; as, a helical staircase; a helical spring. -- Hel"i*cal*ly, adv. [1913 Webster]

‖n. [ L., the marigold, fr. Gr. &unr_; a kind of plant. ] (Bot.) A genus of composite plants, with shining, commonly white or yellow, or sometimes reddish, radiated involucres, which are often called “everlasting flowers.” [ 1913 Webster ]

a. [ Helix + -form. ] Having the form of a helix; spiral. [ 1913 Webster ]

n. (Chem.) A glucoside obtained as a white crystalline substance by partial oxidation of salicin, from a willow (Salix Helix of Linnaeus.) [ 1913 Webster ]

a. (Anat.) Curled; spiral; helicoid; -- applied esp. to certain arteries of the penis. [ 1913 Webster ]

n. [ Helix + -graph. ] An instrument for drawing spiral lines on a plane. [ 1913 Webster ]

a. [ Gr. &unr_;; &unr_;, &unr_;, spiral + &unr_; shape: cf. F. hélicoïde. See Helix. ] [ 1913 Webster ]

1. Spiral; curved, like the spire of a univalve shell. [ 1913 Webster ]

2. (Zool.) Shaped like a snail shell; pertaining to the Helicidae, or Snail family. [ 1913 Webster ]

Helicoid parabola (Math.), the parabolic spiral. [ 1913 Webster ]

n. (Geom.) A warped surface which may be generated by a straight line moving in such a manner that every point of the line shall have a uniform motion in the direction of another fixed straight line, and at the same time a uniform angular motion about it. [ 1913 Webster ]

a. Same as Helicoid. -- Hel`i*coid"al*ly, adv. [1913 Webster]

prop. n. [ L., fr. Gr. "Elikw`n.] A mountain in Bœotia, in Greece, supposed by the Greeks to be the residence of Apollo and the Muses. [1913 Webster]

From Helicon's harmonious springs
A thousand rills their mazy progress take. Gray. [1913 Webster]

‖n. [ NL. See Helicon. ] (Zool.) One of numerous species of Heliconius, a genus of tropical American butterflies. The wings are usually black, marked with green, crimson, and white. [ 1913 Webster ]

a. [ L. Heliconius. ] 1. Of or pertaining to Helicon. “Heliconian honey.” Tennyson. [ 1913 Webster ]

2. (Zool.) Like or pertaining to the butterflies of the genus Heliconius. [ 1913 Webster ]

n. [ NL., fr. Gr. "e`lix, "e`likos, a spiral + ptero`n a wing. ] a heavier-than-air aircraft whose lift is provided by the aerodynamic forces on rotating blades rather than on fixed wings. Contrasted with fixed-wing aircraft. [ PJC ]

v. i. to travel in a helicopter. [ PJC ]

v. t. to transport in a helicopter. [ PJC ]

‖n. [ NL., fr. Gr. "e`lix, "e`likos, a helix + &unr_; a hole. ] (Anat.) The opening by which the two scalae communicate at the top of the cochlea of the ear. [ 1913 Webster ]

a. [ Iso- + Gr. &unr_; a cloud. ] (Phys. Geog.) Having, or indicating, an equal amount of cloudiness for a given period; as, isonephelic regions; an isonephelic line. [ 1913 Webster ]

a. (Chem.) Of, pertaining to, or designating, a substance (called ophelic acid) extracted from a plant (Ophelia) of the Gentian family as a bitter yellowish sirup, used in India as a febrifuge and tonic. [ 1913 Webster ]

a. Of or pertaining to parhelia. [ 1913 Webster ]