Wordnet 3.0
ADJECTIVE (1)
1.
relating to or belonging to plants of the family Umbelliferae;
The Collaborative International Dictionary of English v.0.48:
Umbelliferous \Um`bel*lif"er*ous\, a. [Umbel + -ferous: cf. F.
ombellif[`e]re.] (Bot.)
(a) Producing umbels.
(b) Of or pertaining to a natural order (Umbelliferae) of
plants, of which the parsley, carrot, parsnip, and fennel
are well-known examples.
[1913 Webster]
WordNet (r) 3.0 (2006):
umbelliferous
adj 1: relating to or belonging to plants of the family
Umbelliferae