1. An ulceration (especially of the lips or lining of the mouth)
   - canker

Derived forms: canker sores

Type of: ulcer, ulceration

Encyclopedia: Canker sore

• Ortega y Gasset
• orthicon
• Orthilia
• ortho-
• orthoboric acid
• orthocenter
• orthocentre
• orthochorea
• orthochromatic
• orthochromatic film
• orthoclase
• orthodontia
• orthodontic
• orthodontic braces
• orthodontic treatment
• orthodontics
• orthodontist
• orthodonture
• orthodox
• Orthodox Catholic Church
• Orthodox Church
• Orthodox Jew
• Orthodox Judaism
• orthodox sleep
• orthodoxy