from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A flat-topped or rounded flower cluster in which the individual flower stalks arise from about the same point, as in the geranium, milkweed, onion, and chive.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A flat-topped or rounded flower-cluster (= inflorescence) in which the individual flower stalks arise from the same point, the youngest flowers being at the centre.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of flower cluster in which the flower stalks radiate from a common point, as in the carrot and milkweed. It is simple or compound; in the latter case, each peduncle bears another little umbel, called umbellet, or umbellule.
from The Century Dictionary and Cyclopedia
- n. In the spicular elements of the hexactinellid sponges, a straight shaft or rhabd with rays at one end grouped together in the form of an umbel.
- n. An inflorescence consisting of a number of flower-stalks or pedicels, nearly equal in length, spreading from a common center, their summits forming a level, convex, or even globose surface, more rarely a concave one, as in the carrot. See cuts under inflorescence, Thapsia, and Œnanthe.
- n. In zoology, an umbelliform tuft, cluster, or group of parts, as of polypites borne upon a polypidom. See cut under Umbellularia.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. flat-topped or rounded inflorescence characteristic of the family Umbelliferae in which the individual flower stalks arise from about the same point; youngest flowers are at the center
New Latin umbella, from Latin, parasol, diminutive of umbra, shadow.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin umbella ("umbrella") (Wiktionary)