APA Dictionary of Psychology

a disorder of the pituitary gland caused by necrosis and failure of the anterior lobe of the gland, which may be partial or complete. This results in secondary failure of the gonads, adrenal cortex, and thyroid gland, which depend on the hormonal stimulation of the pituitary. Symptoms include anorexia, atrophy of sexual features, absence of libido, hypotension, bradycardia, and hypoglycemia. [Morris Simmonds (1855–1925), German physician]