Definition of Hystricomorpha in English:


Line breaks: Hys¦trico|morpha
Pronunciation: /ˌhɪstrɪkə(ʊ)ˈmɔːfə


  • A major division of the rodents which includes the guinea pigs, coypu, porcupines and their relatives. They occur chiefly in South America.
    • Suborder Hystricomorpha, order Rodentia
    More example sentences
    • The Guinea Pig, Cavia porcellus, is a mammal of the order Rodentia, sub-order Hystricomorpha and family Caviidae.
    • The Old World members of this group are sometimes placed in a separate group called the porcupine-like rodents (Hystricomorpha).



noun & adjective
More example sentences
  • The myomorph and sciuromorph taxa are included in the Sciurognathi, while most hystricomorphs are in the Hystricognathi.
  • Nevertheless, hystricomorph rodents are an exception among mammals, possessing an insulin molecule with many amino acid substitutions.


modern Latin (plural), from Latin hystrix, hystric- 'porcupine' (from Greek hustrix) + morphē 'form'.

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