Allen's rule

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Allen's rule

[′al·ənz ‚rül]
(vertebrate zoology)
The generalization that the protruding parts of a warm-blooded animal's body, such as the tail, ears, and limbs, are shorter in animals from cold parts of the species range than from warm parts.
References in periodicals archive ?
Allen's Law, discovered by the famous Yale historian Frederick Lewis Allen, states that "everything is more complicated than it looks to most people.
Allen's law practice focused on business, securities, and intellectual property matters and managing litigation for life science companies.