capitate

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Enlarged and globular at the tip, as a bone of the wrist having a rounded knoblike end or the stigma of certain flowers.
• adjective Having flowers arranged in a dense headlike cluster.

from The Century Dictionary.

• To put a head upon; specifically, in mathematics, to prefix to (a symbol) a number not less than the highest digit contained in it: thus 12 may be capitated into 212.
• In botany, head-shaped, or collected in a head, as a dense terminal cluster of sessile or nearly sessile flowers; having a rounded head: as, a capitate stigma.
• In ornithology, having an enlarged extremity: as, the capitate feather of a peacock's tail.
• In entomology, suddenly enlarged at the end so as to form a ball or oval mass: applied to the antennæ of insects when this form is produced by several expanded terminal joints, as in most of the Curculionidæ.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Headlike in form; also, having the distal end enlarged and rounded, as the stigmas of certain flowers.
• adjective (Bot.) Having the flowers gathered into a head.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective anatomy Having a distinct globular tip.
• adjective botany Forming a dense, head-like cluster, such as the inflorescences of composites.
• noun anatomy The capitate bone of the wrist.
• verb US To pay health-care providers using a capitation system.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective being abruptly enlarged and globose at the tip
• noun the wrist bone with a rounded head shape that articulates with the 3rd metacarpus