Also found in: Dictionary, Encyclopedia.
aphtha(af'tha) (af'the) plural.aphthae [Gr. aphtha, small ulcer]
A small ulcer on a mucous membrane of the mouth, as in thrush. aphthic (-thik), adjective
Bednar's aphthaeSee: Bednar's aphthae
A lesion formed beneath the tongue and accompanied by severe constitutional symptoms.
Medical Dictionary, © 2009 Farlex and Partners