pyrene

A hydrocarbon (C₁₅H₁₂) obtained from coaltar.

A stone or putamen, properly when there are several in a single fruit, as in the huckleberry and other berry-like drupes, and in some pomes with a stony endocarp, as those of the hawthorn and medlar; a nutlet. Also ossiculus.

One of the less volatile hydrocarbons of coal tar, obtained as a white crystalline substance, C16H10.

Same as pyrena.

A polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar

the stone of a drupe

a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar

the small hard nutlet of a drupe or drupelet; the seed and the hard endocarp that surrounds it