RhymeZone: spiny rat definitions

Definitions of spiny rat:

noun: Any of certain caviomorph rodents of the family Echimyidae, especially of genus Proechimys, that resemble rats and have stiff, pointed hairs, or spines.
noun: Any murine rodent of the genus Maxomys (sometimes considered a subgenus of Rattus).
noun: Any murine rodent of the genus Tokudaia.
noun: Any murine rodent of the genus Echiothrix.

(Definitions from Wiktionary)