pyrene

from WordNet (r) 3.0 (2006)

pyrene
    n 1: a pale yellow crystalline hydrocarbon C16H10 extracted from
         coal tar
    2: the small hard nutlet of a drupe or drupelet; the seed and
       the hard endocarp that surrounds it

from The Collaborative International Dictionary of English v.0.48

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]

from The Collaborative International Dictionary of English v.0.48

Pyrene \Py"rene\, n. (Bot.)
   Same as {Pyrena}.
   [1913 Webster]

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