tonsil defined in 1951 yeartonsil - tonsil;
tonsil - Mass of lymphoid tissue in mouth or phraynx of tetrapods. Lies close underneath mucous membrane, deep crevices of which may communicate with interior of tonsil. Man has a pair of palatine tonsils (at junction of mouth and pharynx) and a single pharyngeal tonsil ('adenoids' at back of nose). Probably concerned in defence of mouth and pharynx against bacteria.
near tonsil in Knolik
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