| Helicoid 1. (a.) Spiral; curved, like the spire of a univalve shell. 2. (a.) Shaped like a snail shell; pertaining to the Helicidae, or Snail family. 3. (n.) 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. Thesaurus Entries ambagious, circuitous, circumlocutory, cochlear, cochleate, convoluted, convolutional, corkscrew, corkscrewy, flexuose, flexuous, helical, helicoid, involute, involuted, involutional, labyrinthine, mazy, meandering, meandrous, rivose, rivulose, roundabout, ruffled, screw-shaped, scrolled, serpentine, sinuate, sinuose, sinuous, snaky, spiral, spiroid, torsional, tortile, tortuous, turbinal, turbinate, turning, twisting, twisty, verticillate, volute, voluted, whorled, winding, wreathlike, wreathy |