spiny mouse

noun

Definition of spiny mouse

  1. 1 :  any of various mice of the genus Acomys that are closely related to the house mouse but distinguished by an almost entirely spiny coat, are native to the Mediterranean area, and are sometimes kept as pets in Europe

  2. 2 :  any of several New World fossorial pocket mice (as of the genus Heteromys) with spiny pelage

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a rounded knoll or a ridge of ice

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