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allenes
allene
(organic chemistry) Any of a class of hydrocarbons having two double bonds from one carbon atom to two others - R₂C=C=CR₂; especially the parent compound CH₂=C=CH₂ (propadiene).
allenic
Allens
Allens
Allen
(colloquial) Short for Allen wrench.
Allen
An English and Scottish surname transferred from the given name derived from the given name Alan.
Allen County
A county of Indiana, United States. County seat: Fort Wayne. Named after John Allen. / A county of Kansas, United States. County seat: Iola. Named after William Allen.
Allen's rule
An ecogeographic principle broadly stating that animals adapted to cold climates have relatively short limbs. Specifically, homeothermic animals in hot climates have low volume-to-surface ratios, and homeothermic animals in cold climates have high volume-to-surface ratios, due to thermal adaptation.