pyrene

py·rene  (prn, p-rn)

n.

The stone of certain fruits, such as the cherry.

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[New Latin prna, from Greek purn.]

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pyrene¹

n

(Chemistry / Elements & Compounds) a solid polynuclear aromatic hydrocarbon extracted from coal tar. Formula: C₁₆H₁₀

[from pyro- + -ene]

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pyrene²

n

(Life Sciences & Allied Applications / Botany) Botany any of several small hard stones that occur in a single fruit and contain a single seed each

[from New Latin pyrena, from Greek purēn]

Thesaurus

Noun	1.	pyrene - a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar hydrocarbon - an organic compound containing only carbon and hydrogen
	2.	pyrene - the small hard nutlet of a drupe or drupelet; the seed and the hard endocarp that surrounds it nutlet - a small nut