allen's rule
 

* 1.Within species of warm-blooded animals (birds + mammals) those populations living in colder environments will tend to have shorter appendages than populations in warmer areas

English Related Words* 48-hour rule

* 90-90 rule

* abegg's rule

* absolute priority rule

* aeroplane rule

* airplane rule

* algorithmic rule

* american rule

* ampere's rule

* apply a rule

* arcane rule

* as a general rule

* as a rule

* aston whole number rule

* azimuth adjustment slide rule