Whorl
Whorl , noun
[Old English whorvil the whirl of a spindle; akin to Anglo-Saxon hweorfa the whirl of a spindle, hweorfan to turn; compare OD. worvel the whirl of a spindle. See Whirl, n. & v.]
1.
(Botany) A circle of two or more leaves, flowers, or other organs, about the same part or joint of a stem.
2.
(Zoology) A volution, or turn, of the spire of a univalve shell.
3.
(Spinning) The fly of a spindle.