n. In botany, the acorn, or a similar fruit.n. In medicine: A strumous swelling or enlargement of the thyroid gland; bronchocele; goiter.n. A pessary; a suppository.n. In anatomy, the head of the penis or of the clitoris. More fully called glans penis and glans clitoridis.n. [capitalized] In conchology, a genus of mollusks.