Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors adapted for gnawing or nibbling.
  • adj. Gnawing.
  • adj. Of or relating to rodents.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mammal of the order Rodentia, characterized by long incisors that grow continuously and are worn down by gnawing.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Gnawing; biting; corroding; (Med.) applied to a destructive variety of cancer or ulcer.
  • adj.
  • adj. Gnawing.
  • adj. Of or pertaining to the Rodentia.
  • n. One of the Rodentia.

from The Century Dictionary and Cyclopedia

  • Gnawing, as certain mammals; habitually feeding upon vegetable substances, which are gnawed or bitten first with the front teeth; pertaining to the Rodentia, Rosores, or Glires, or having their characters; gliriform.
  • n. A member of the order Rodentia, Rosores, or Glires; a rodent mammal; a gnawer.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing

Etymologies

From New Latin Rōdentia, order name, from Latin rōdēns, rōdent-, present participle of rōdere, to gnaw; see rēd- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin rōdēns ("gnawer; one who gnaws"), present participle of rōdō ("I gnaw"). (Wiktionary)

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