[医] 走马疳, 坏疽性口炎

[ noun ]
acute ulceration of the mucous membranes of the mouth or genitals; often seen in undernourished children
<noun.state>

Noma \No"ma\, n. [NL., fr. Gr. ?, lit., a feeding. See {Name}.]
(Med.)
See {Canker}, n., 1.

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}.