Capitulum

n. pl. Capitula (kå*pĭt"&uuptack_;*lå).
  1. A thick head of flowers on a very short axis, as a clover top, or a dandelion; a composite flower. A capitulum may be either globular or flat.
  2. (Anat.) A knoblike protuberance of any part, esp. at the end of a bone or cartilage. [See Illust. of Artiodactyla.]

[See Illust. of Artiodactyla.]