from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The stone of certain fruits, such as the cherry.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar
- n. the stone of a drupe
from the GNU version of the Collaborative International Dictionary of English
- n. One of the less volatile hydrocarbons of coal tar, obtained as a white crystalline substance, C16H10.
- n. Same as pyrena.
from The Century Dictionary and Cyclopedia
- n. 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.
- n. A hydrocarbon (C15H12) obtained from coaltar.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar
- n. the small hard nutlet of a drupe or drupelet; the seed and the hard endocarp that surrounds it
New Latin pȳrēna, from Greek purēn.(American Heritage® Dictionary of the English Language, Fourth Edition)
From pyr- + -ene. (Wiktionary)
From Ancient Greek πυρήν ("fruit stone"). (Wiktionary)