WordReference Random House Learner's Dictionary of American English © 2020
ˈtrench ˌmouth, n. [uncountable]
  • Pathologya serious infection of the gums and throat, caused by bacteria.

  • WordReference Random House Unabridged Dictionary of American English © 2020
    trench mouth′. 
  • See Vincent's angina.
    • so called from its high incidence among soldiers in the trenches 1915–20

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