Relating to or affected by aphthae; characterized by small painful ulcers or blisters in the mouth.
From Greek aphtha (blister, ulcer) + -ous (Latin adjective suffix). This is the most common modern form of the adjective, used extensively in dental and medical contexts.
Almost everyone gets 'aphthous ulcers' but most people call them canker sores—showing how medical precision and everyday language describe the exact same painful reality in completely different words!
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