HELICOID
Etymology
Adjective
helicoid (comparative more helicoid, superlative most helicoid)
Having the form of a flattened helix
Noun
helicoid (plural helicoids)
(mathematics) A minimal surface in the form of a flattened helix.
Source: Wiktionary
Hel"i*coid, a. Etym: [Gr. hélicoïde. See Helix.]
1. Spiral; curved, like the spire of a univalve shell.
2. (Zoöl.)
Definition: Shaped like a snail shell; pertaining to the Helicidæ, or Snail
family. Helicoid parabola (Math.), the parabolic spiral.
Hel"i*coid, n. (Geom.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition