A small oral mass of lymphoid tissue, especially either of two such masses embedded in the lateral walls of the opening between the mouth and the pharynx, of uncertain function, but believed to help protect the body from respiratory infections.

• 扁桃体圆形团状的小淋巴细胞组织，特别指连结于口与喉开口联接处后壁上的两个这样的组织，其作用尚未完全确定，但一般认为能防止上呼吸道感染