pyrene

Noun
  1. A pale yellow crystalline hydrocarbon C16H10 extracted from coal tar (synset 114983076)
    is a type of: hydrocarbon - an organic compound containing only carbon and hydrogen
  2. The small hard nutlet of a drupe or drupelet;
    The seed and the hard endocarp that surrounds it (synset 113157640)
    is a type of: nutlet - a small nut

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