See under .
a small, somewhat cherry-shaped double structure attached by a stalk to the base of the brain and constituting the master endocrine gland affecting all hormonal functions in the body, consisting of an anterior region ((anterior pituitary) or (adenohypophysis)) that develops embryonically from the roof of the mouth and that secretes growth hormone, LH, FSH, ACTH, TSH, and MSH, a posterior region ((posterior pituitary) or (neurohypophysis)) that develops from the back of the forebrain and that secretes the hormones vasopressin and oxytocin, and an intermediate part (pars intermedia) derived from the anterior region but joined to the posterior region, that secretes the hormone MSH in lower vertebrates.
the anterior lobe of the pituitary gland Compare neurohypophysis
the master endocrine gland, attached by a stalk to the base of the brain. Its two lobes (the adenohypophysis and neurohypophysis) secrete hormones affecting skeletal growth, development of the sex glands, and the functioning of the other endocrine glands Also called hypophysis, hypophysis cerebri See also adenohypophysis, neurohypophysis
adenohypophysis ad·e·no·hy·poph·y·sis (ād’n-ō-hī-pŏf’ĭ-sĭs)
The anterior glandular lobe of the pituitary gland, consisting of distal, intermediate, and infundibular parts, and secreting many hormones, including gonadotropin, prolactin, and somatotropin. Also called anterior lobe of hypophysis.
ad’e·no·hy’po·phy’sĭ·al (-hī’pə-fĭz’ē-əl, -hī-pŏf’ĭ-sē’əl) adj.
pituitary gland n.
A small, oval endocrine gland attached to the base of the vertebrate brain and consisting of an anterior and a posterior lobe, the secretions of which control the other endocrine glands and influence growth, metabolism, and maturation. Also called hypophysis, master gland.
A gland at the base of the brain in vertebrate animals that is divided into two regions, anterior and posterior, each of which secretes important hormones. The anterior portion, whose secretions are directly controlled by the hypothalamus, produces hormones that regulate the function of most of the body’s hormone-producing glands and organs, including the thyroid and adrenal glands. Growth hormone is also produced by the anterior pituitary. The posterior pituitary releases antidiuretic hormone (ADH) and oxytocin.
pituitary gland [(pi-tooh-uh-ter-ee)]
A small gland, attached to the base of the brain and controlled by the hypothalamus, that functions in the endocrine system. The pituitary gland secretes many hormones: some control the actions of other glands, whereas others influence growth, metabolism, and reproduction.
adenohypophysitis adenohypophysitis ad·e·no·hy·poph·y·si·tis (ād’n-ō-hī-pŏf’ĭ-sī’tĭs) n. Inflammation of the anterior pituitary gland, often related to pregnancy.
Usually, adenoids. an enlarged mass of lymphoid tissue in the upper pharynx, often obstructing breathing through the nasal passages. of or relating to the lymph glands. of or relating to the adenoids. Historical Examples When this adenoid tissue grows abnormally large it forms what are known as “adenoids.” Adenoids: What They Are, How To Recognize […]
- Adenoid facies
adenoid facies adenoid facies n. The appearance in children with adenoid hypertrophy, associated with a pinched nose and an open mouth.
- Adenoid cystic carcinoma
adenoid cystic carcinoma adenoid cystic carcinoma n. A carcinoma characterized by large epithelial masses containing round glandlike spaces or cysts, frequently containing mucus, that are bordered by layers of epithelial cells. Also called cylindromatous carcinoma.