- A dictionary of medical eponyms

Bergmann's rule

Related people

States that body weight tends to a minimum in warmer regions, increases to a certain threshold as temperature declines, and then falls off again as temperature falls further. Birds and mammals in cold regions have been observed to be bulkier than individuals of the same species in warm regions. It was proposed by Carl Bergmann, to account for an adaptive mechanism to conserve or to radiate body heat, depending on climate.

See also Allen's rule, under Dudley Peter Allen, American physician and surgeon, 1852-1915.


  • C. Bergmann:
    Ueber die Verhältnisse der wärmeökonomie der Thiere zu ihrer Grösse.
    Göttinger Studien, Göttingen, 1847, 3 (1), 595-708.

What is an eponym?

An eponym is a word derived from the name of a person, whether real or fictional. A medical eponym is thus any word related to medicine, whose name is derived from a person.

What is Whonamedit?

Whonamedit.com is a biographical dictionary of medical eponyms. It is our ambition to present a complete survey of all medical phenomena named for a person, with a biography of that person.


Whonamedit? does not give medical advice.
This survey of medical eponyms and the persons behind them is meant as a general interest site only. No information found here must under any circumstances be used for medical purposes, diagnostically, therapeutically or otherwise. If you, or anybody close to you, is affected, or believe to be affected, by any condition mentioned here: see a doctor.