capitulum
NounWordNet 3.0
Webster's Dictionary (GCIDE)
Capitulum \Ca*pit"u*lum\ (k[.a]*p[i^]t"[-u]*l[u^]m), n.; pl. Capitula (k[.a]*p[i^]t"[-u]*l[.a]). [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.
Note: [See Illust. of Artiodactyla.] [1913 Webster]