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canker of the mouth

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Canker \Can"ker\ (k[a^][ng]"k[~e]r), n. [OE. canker, cancre, AS.
   cancer (akin to D. kanker, OHG chanchar.), fr. L. cancer a
   cancer; or if a native word, cf. Gr. ? excrescence on tree, ?
   gangrene. Cf. also OF. cancre, F. chancere, fr. L. cancer.
   See {cancer}, and cf. {Chancre}.]
   1. A corroding or sloughing ulcer; esp. a spreading
      gangrenous ulcer or collection of ulcers in or about the
      mouth; -- called also {water canker}, {canker of the
      mouth}, and {noma}.

   2. Anything which corrodes, corrupts, or destroy.

            The cankers of envy and faction.      --Temple.

   3. (Hort.) A disease incident to trees, causing the bark to
      rot and fall off.

   4. (Far.) An obstinate and often incurable disease of a
      horse's foot, characterized by separation of the horny
      portion and the development of fungoid growths; -- usually
      resulting from neglected thrush.

   5. A kind of wild, worthless rose; the dog-rose.

            To put down Richard, that sweet lovely rose. And
            plant this thorm, this canker, Bolingbroke. --Shak.

   {Black canker}. See under {Black}.
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