umbel definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a cluster of flowers with stalks of nearly equal length which spring from about the same point, like the ribs of an umbrella
Origin: Classical Latin umbella, parasol: see umbrella
designating a family (Apiaceae, order Apiales) of hollow-stemmed, herbaceous, dicotyledonous plants having umbels, including celery and parsley
umbel definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.
Origin: New Latin umbella, from Latin, parasol, diminutive of umbra, shadow.
umbel - Science Definition
A flat or rounded indeterminate inflorescence in which the individual flower stalks (called pedicels) arise from about the same point on the stem at the tip of the peduncle. The geranium, milkweed, and onion have umbels. Umbels usually show centripetal inflorescence, with the lower or outer flowers blooming first.