'Pyrene' definitions:

Definition of 'pyrene'

From: WordNet
noun
A pale yellow crystalline hydrocarbon C16H10 extracted from coal tar
noun
The small hard nutlet of a drupe or drupelet; the seed and the hard endocarp that surrounds it

Definition of 'Pyrene'

From: GCIDE
  • Pyrene \Py"rene\, n. [Gr. ? fire.] (Chem.) One of the less volatile hydrocarbons of coal tar, obtained as a white crystalline substance, C16H10. [1913 Webster]

Definition of 'Pyrene'

From: GCIDE
  • Pyrene \Py"rene\, n. (Bot.) Same as Pyrena. [1913 Webster]