HELICIN
Hel"i*cin, n. (Chem.)
Defn: A glucoside obtained as a white crystalline substance by partial oxidation of salicin, from a willow (Salix Helix of Linnæus.)
HELICINE
Hel"i*cine, a. (Anat.)
Defn: Curled; spiral; helicoid; — applied esp. to certain arteries of the penis.
HELICOGRAPH
Hel"i*co*graph`, n. Etym: [Helix + -graph.]
Defn: An instrument for drawing spiral lines on a plane.
HELICOID
Hel"i*coid, a. Etym: [Gr. hélicoïde. See Helix.]
1. Spiral; curved, like the spire of a univalve shell.
2. (Zoöl.)
Defn: Shaped like a snail shell; pertaining to the Helicidæ, or Snail family. Helicoid parabola (Math.), the parabolic spiral.