capitulum

‖n.; pl. Capitula [ L., a small head. ] 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. Gray. [ 1913 Webster ]

2. (Anat.) A knoblike protuberance of any part, esp. at the end of a bone or cartilage. [ See Illust. of Artiodactyla. ] [ 1913 Webster ]