Aphthous
Pronunciation : Aph"thous a.
Etymology : [Cf. F. aphtheux.]
Definition : Defn: Pertaining to, or caused by, aphth?; characterized by apht?; as, aphthous ulcers; aphthous fever.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder