Original: Adenoids ( or pharyngeal tonsils , or nasopharyngeal tonsils ) are a mass of lymphoid tissue situated at the very back of the nose , in the roof of the nasopharynx , where the nose blends into the mouth .
Simplified: Adenoids ( also called pharyngeal tonsils , or nasopharyngeal tonsils ) are tissues at the very back of the nose , in the roof of the nasopharynx , where the nose blends into the mouth .