Allen's rulen.

Brit.

/ˈalənz ˌruːl/, U.S.

/ˈælənz rul/

Origin: From a proper name, combined with an English element. Etymons: proper name Allen , rule n.¹

Etymology: < the genitive of the name of Joel A. Allen (1838–1921), United States zoologist, who first formulated the rule in 1877 ( Radical Rev. 1 116) + rule n.¹

Zoology.

An empirical rule according to which the appendages of a warm-blooded animal are smaller in populations occupying the cooler parts of its geographical range. Cf. Bergmann n.

ΘΚΠ

the world > life > the body > part of body > [noun] > rule relating to proportions of parts

Allen's rule1937

1937 W. C. Allee & K. P. Schmidt Hesse's Ecol. Animal Geogr. xx. 389 In keeping with this general rule [sc. Bergmann's Principle] we find that mammals of cold climates have their heat-radiating surfaces decreased by a reduction in size of the ear and tail, by a shortening of the neck and legs, in general by a more compact form. This has been referred to as Allen's Rule.

1973 B. J. Williams Evol. & Human Origins xiii. 221 Allen's rule is concerned with changes in shape to achieve the optimal volume-to-surface area ratio.

2010 J. F. Merritt Biol. Small Mammals x. 209 Relative tail length generally decreases with increasing latitude, in accord with Allen's rule.

This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021).

单词	allens rule
释义	Allen's rulen. Brit. /ˈalənz ˌruːl/, U.S. /ˈælənz rul/ Origin: From a proper name, combined with an English element. Etymons: proper name Allen , rule n.¹ Etymology: < the genitive of the name of Joel A. Allen (1838–1921), United States zoologist, who first formulated the rule in 1877 ( Radical Rev. 1 116) + rule n.¹ Zoology. An empirical rule according to which the appendages of a warm-blooded animal are smaller in populations occupying the cooler parts of its geographical range. Cf. Bergmann n. ΘΚΠ the world > life > the body > part of body > [noun] > rule relating to proportions of parts Allen's rule1937 1937 W. C. Allee & K. P. Schmidt Hesse's Ecol. Animal Geogr. xx. 389 In keeping with this general rule [sc. Bergmann's Principle] we find that mammals of cold climates have their heat-radiating surfaces decreased by a reduction in size of the ear and tail, by a shortening of the neck and legs, in general by a more compact form. This has been referred to as Allen's Rule. 1973 B. J. Williams Evol. & Human Origins xiii. 221 Allen's rule is concerned with changes in shape to achieve the optimal volume-to-surface area ratio. 2010 J. F. Merritt Biol. Small Mammals x. 209 Relative tail length generally decreases with increasing latitude, in accord with Allen's rule. This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021). < n.1937
随便看	eggshellest eggshellful eggshells eggslice eggslicer eggspoon eggstage eggstall eggstarch eggstate eggstone eggstring eggsucker eggsunday eggtester eggtimer eggtongs eggtooth eggtrot eggtube eggurchin eggweb eggwhip eggwhisk eggwhisks