- Helicoid parabola
- Helicoid Hel"i*coid, a. [Gr. ?; ?, ?, spiral + ? shape: cf. F.
h['e]lico["i]de. See {Helix}.]
[1913 Webster]
1. Spiral; curved, like the spire of a univalve shell.
[1913 Webster]
2. (Zo["o]l.) Shaped like a snail shell; pertaining to the {Helicid[ae]}, or Snail family. [1913 Webster]
{Helicoid parabola} (Math.), the parabolic spiral. [1913 Webster]
The Collaborative International Dictionary of English. 2000.