Word Study
Verticil
CIDE DICTIONARY
Verticil, n. [L. verticillus, dim. of vertex a whirl: cf. F. verticille. See Vertex.].
A circle either of leaves or flowers about a stem at the same node; a whorl. [1913 Webster]
OXFORD DICTIONARY
Verticil, n. Bot. & Zool. a whorl; a set of parts arranged in a circle round an axis.
Derivative
verticillate adj.
Etymology
L verticillus whorl of a spindle, dimin. of VERTEX
For further exploring for "Verticil" in Webster Dictionary Online