a cluster of flowers with stalks of nearly equal length which spring from about the same point, like the ribs of an umbrella
Origin:
L umbella, parasol: see umbrella
adjective
designating a family (Apiaceae, order Apiales) of hollow-stemmed, herbaceous, dicotyledonous plants having umbels, including celery and parsley
See umbel in American Heritage Dictionary 4
noun
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.