Webster's Revised Unabridged Dictionary · 1913

Rodent

Rodent , adjective

[Latin rodens, -entis, present participle of rodere to gnaw. See Rase, transitive verb, and compare Rostrum.]

1.
(Medicine) Gnawing; biting; corroding; (Medicine) applied to a destructive variety of cancer or ulcer.
2.
(a) (Zoology) Gnawing.
(b)
(Zoology) Of or pertaining to the Rodentia.

Rodent , noun

(Zoology) One of the Rodentia.