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Definition of Aphthous
1. a. Pertaining to, or caused by, aphthæ; characterized by aphtæ; as, aphthous ulcers; aphthous fever.
Definition of Aphthous
1. aphtha [adj] - See also: aphtha
Medical Definition of Aphthous
1. Characterised by or relating to aphthae or aphthosis. (05 Mar 2000)