aphtha
1. In the singular, a small ulcer on a mucous membrane. 2. In the plural, stomatitis charactized by intermittent episodes of painful oral ulcers of unknown etiology that are covered by gray exudate, are surrounded by an erythematous halo, and range from several millimeters to 2 cm in diameter; they are limited to oral mucous membranes that are not bound to periosteum, occur as solitary or multiple lesions, and heal spontaneously in 1–2 weeks. SYN: aphthae minor, aphthous stomatitis, canker sores, recurrent aphthous stomatitis, recurrent aphthous ulcers, recurrent ulcerative stomatitis, ulcerative stomatitis. [G. ulceration]
- Bednar aphthae traumatic ulcers located bilaterally on either side of the midpalatal raphe in infants.
- herpetiform aphthae a variant of oral aphthae, of unknown etiology, characterized by up to several dozen ulcers, 2–3 mm in diameter, organized in a clustered herpetiform distribution.
- aphthae major a severe form of aphthae characterized by unusually numerous, large, deep, and frequent ulcers; healing may take as long as 6 weeks and results in scarring. SYN: Mikulicz aphthae, periadenitis mucosa necrotica recurrens, recurrent scarring aphthae, Sutton disease.
- Mikulicz aphthae SYN: aphthae major.
- aphthae minor SYN: a. (2).
- recurrent scarring aphthae SYN: aphthae major.

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aph·tha 'af-thə, 'ap-thə also ap·tha 'ap- n, pl aph·thae also ap·thae -.thē
1) a speck, flake, or blister on the mucous membranes (as in the mouth or gastrointestinal tract or on the lips) characteristic of some diseases (as thrush)
2) one of the vesicles filled with clear serous fluid that occur in the mouth, on the udder, and in the spaces between the digits of cloven-footed animals in some diseases usu. used in pl.
3) a disease (as foot-and-mouth disease) characterized by aphthae
aph·thic -thik adj

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aph·tha (afґthə) pl. aphґthae [L., from Gr. “thrush”] a small ulcer, such as the round lesion with a grayish exudate surrounded by a red halo characteristic of recurrent aphthous stomatitis.

Multiple aphthae in aphthous stomatitis.


Medical dictionary. 2011.

Look at other dictionaries:

  • aphtha — [af′thə] n. pl. aphthae [af′thē] 〚ModL < L aphthae (occurring only in pl.) < Gr aphtha (pl. aphthai), eruption, thrush < haptein, to inflame〛 a small, white spot or pustule, caused by either viral or fungal infections, that appears in the mouth,… …   Universalium

  • aphtha — [af′thə] n. pl. aphthae [af′thē] [ModL < L aphthae (occurring only in pl.) < Gr aphtha (pl. aphthai), eruption, thrush < haptein, to inflame] a small, white spot or pustule, caused by either viral or fungal infections, that appears in… …   English World dictionary

  • Aphtha — Aph tha, n. [Sing. of {Aphth[ae]}.] (Med.) (a) One of the whitish specks called aphth[ae]. (b) The disease, also called thrush. [1913 Webster] || …   The Collaborative International Dictionary of English

  • aphtha —   n. (pl. ae ) small white spot or small ulceration on mucous membrane, etc. in humans or animals; disease associated with aphthae, such as thrush.    ♦ aphthic, a.    ♦ aphthous, a., pertaining to aphtha;    ♦ aphthous fever, foot and mouth… …   Dictionary of difficult words

  • aphtha — noun thrush (the disease) …   Wiktionary

  • aphtha — n. infection of the mouth …   English contemporary dictionary

  • aphtha — (G). An eruption, ulcer …   Dictionary of word roots and combining forms

  • aphtha — aph·tha …   English syllables

  • aphtha — …   Useful english dictionary

  • Афта (Aphtha, Множ. Aphthae) — небольшое изъязвление (единичное или множественное) полости рта в виде белых или красных пятнышек. Причина их появления неизвестна, устраняются с помощью паллиативного лечения. Афтозный (aphthous). Источник: Медицинский словарь …   Медицинские термины

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