Foster's rule

[ faw-sterz rool, fos-terz ]

  1. a theory asserting that members of a species will evolve into smaller or larger versions of themselves depending on available land area and resources as well as predator populations: Foster’s rule explains the phenomena of insular dwarfism and insular gigantism.

Origin of Foster's rule

Named in 1964 after J. Bristol Foster (born 1936), Canadian biologist
  • Also called is·land ef·fect, is·land rule .

Words Nearby Foster's rule Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023