Source : Webster's Revised Unabridged Dictionary (1913)

Umbelliferone \Um`bel*lif"er*one\, n. (Chem.)
   A tasteless white crystalline substance, {C9H6O3}, found in
   the bark of a certain plant ({Daphne Mezereum}), and also
   obtained by the distillation of certain gums from the
   {Umbellifer[ae]}, as galbanum, asafetida, etc. It is
   analogous to coumarin. Called also {hydroxy-coumarin}.

Umbelliferous \Um`bel*lif"er*ous\, a. [Umbel + -ferous: cf. F.
   ombillif[`e]re.] (Bot.)
   (a) Producing umbels.
   (b) Of or pertaining to a natural order ({Umbellifer[ae]}) of
       plants, of which the parsley, carrot, parsnip, and fennel
       are well-known examples.

Source : WordNet®

Umbelliferae
     n : plants having flowers in umbels: parsley; carrot; anise;
         caraway; celery; dill [syn: {family Umbelliferae}, {Apiaceae},
          {family Apiaceae}, {carrot family}]