n. One of a breed of hardy cattle originating in the country of Devon, England. Those of pure blood have a deep red color. The small, longhorned variety, called North Devons, is distinguished by the superiority of its working oxen. [ 1913 Webster ]

a. (Geol.) Of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system. [ 1913 Webster ]

Devonian age (Geol.), the age next older than the Carboniferous and later than the Silurian; -- called also the Age of fishes. The various strata of this age compose the Devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology. [ 1913 Webster ]

n. The Devonian age or formation. [ 1913 Webster ]