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

Derived forms: canker sores

Type of: ulcer, ulceration

Encyclopedia: Canker sore

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Canis niger
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canister
canister shot
canker
canker brake
canker sore
cankerous
cankerweed
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Cannabidaceae
cannabin