an enlarged mass of lymphoid tissue at the back of the pharynx characteristically obstructing breathing -- usually used in plural
Lymphoid tissue located behind the nose.
Greek aden = a gland, eidos = shape or form.
single midline lymph gland above the soft palate at the very back of the nose.
Adenoid refers to a resemblance to a gland in appearance; in the plural: hypertrophied lymph tissue in the nasopharynx; known as the pharyngeal tonsil.
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.