pituitary gland biology definition
pituitary gland. noun piÂ·tuÂ·iÂ·tary gland \pÉ-ËtÃ¼-É-Ëter-Ä-, -ËtyÃ¼-\. Definition of pituitary gland for Students. : a gland at the base of the brain that produces several hormones of which one affects growth.