'Zinnia' definitions:

Definition of 'zinnia'

(from WordNet)
noun
Any of various plants of the genus Zinnia cultivated for their variously and brightly colored flower heads [syn: zinnia, old maid, old maid flower]

Definition of 'Zinnia'

From: GCIDE
  • Zinnia \Zin"ni*a\, n. [NL. So called after Professor Zinn, of G["o]ttingen.] (Bot.) Any plant of the composite genus Zinnia, Mexican herbs with opposite leaves and large gay-colored blossoms. {Zinnia elegans} is the commonest species in cultivation. [1913 Webster]