helicoid
'helikɒid
基本解释
a. 螺旋状的, 蜗牛壳状的, 回转式的
n. 螺旋体, 螺旋面
英文释义
a. Spiral; curved, like the spire of a univalve shell.
a. Shaped like a snail shell; pertaining to the Helicidae,
or Snail family.
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.
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