whorl

中文： 轮、螺旋、螺纹

1. Each circle, volution or equivalent in a pattern of concentric circles, ovals, arcs, or a spiral.
2. A circle of three or more leaves, flowers, or other organs, about the same part or joint of a stem.
3. A volution, or turn, of the spire of a univalve shell.
4. Any volution, as for example in the human ear or fingerprint.
5. A flywheel, a weight attached to a spindle.

复数 whorls