Ca-pīt'ū-lūm, n.

noun

n. [Lat., a small head. See supra.] (Bot.) A thick head or cluster of flowers on a very short axis, as a clover-top, or a dandelion. It may be either globular or flat. Gray.

A botanical illustration of a rounded flower head with radiating florets and several leaves on a stem.
Capitulum.