In higher vertebrates, masses of lymphoid tissue situated at the back of the mouth and throat (palatine tonsils), and on the rear surface of the tongue (lingual tonsils). The tonsils contain many lymphocytes and are part of the body's defence system against infection.
The adenoids are sometimes called pharyngeal tonsils.
The temple of Angkor Wat had five towers but often only three are depicted. Red and blue recall the earlier flags of Cambodia. Effective date: 20 June 1993.