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pyrene

 [pahy-reen, pahy-reen]  

py·rene

1   [pahy-reen, pahy-reen]
noun Botany.
a putamen or stone, especially when there are several in a single fruit; a nutlet.
Origin:
1830–40; < Neo-Latin pȳrēna < Greek pȳrḗn fruit stone

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Pyrene is always a great word to know.
So is naked seed. Does it mean:
ovules which are unenclosed, forming on cones or stalks
organism capable of self-nourishment which uses photosynthesis or chemosynthesis for energy
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Dictionary.com Unabridged

py·rene

2   [pahy-reen]
noun Chemistry.
a polycyclic, aromatic crystalline hydrocarbon, C16H10, consisting of four fused benzene rings, found in coal tar and believed to be carcinogenic.
Origin:
1880–85; pyr- + -ene
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To pyrene
Collins
World English Dictionary
pyrene1 (ˈpaɪriːn)
 
—n
a solid polynuclear aromatic hydrocarbon extracted from coal tar. Formula: C16H10
 
[C19: from pyro- + -ene]

pyrene2 (ˈpaɪriːn)
 
—n
botany any of several small hard stones that occur in a single fruit and contain a single seed each
 
[C19: from New Latin pyrena, from Greek purēn]

Collins English Dictionary - Complete & Unabridged 10th Edition
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