What does adenohypophysis mean?
The adenohypophysis is the anatomical name for the anterior lobe of the pituitary gland, the pea-sized structure suspended beneath the hypothalamus at the base of the brain. Unlike the posterior pituitary, which merely stores hormones made in the brain, the adenohypophysis is genuinely glandular: it manufactures and secretes its own hormones, including growth hormone, prolactin, thyroid-stimulating hormone, adrenocorticotropic hormone, and the gonadotropins FSH and LH. Through these messengers it regulates growth, metabolism, reproduction, lactation, and the stress response, earning the pituitary its traditional label as the 'master gland.' The term appears chiefly in anatomy textbooks, endocrinology, and clinical medicine, where disorders such as pituitary adenomas are described in relation to it. For everyday readers, the simpler phrase 'anterior pituitary' conveys the same meaning without the Greek-derived formality.
nounThe anterior lobe of the pituitary gland, which secretes hormones such as growth hormone, prolactin, and the tropic hormones that regulate other endocrine glands.
- The anterior lobe of the pituitary gland, composed of glandular tissue that synthesizes and secretes hormones including growth hormone, prolactin, TSH, ACTH, FSH, and LH.
"Damage to the adenohypophysis can disrupt the hormonal signals that govern the thyroid, adrenal glands, and gonads."
"Histologically, the adenohypophysis is divided into the pars distalis, pars tuberalis, and pars intermedia."
"A benign tumor arising in the adenohypophysis may secrete excess prolactin or growth hormone."
The plural follows the Greek-style '-is' to '-es' pattern and is rare outside comparative anatomy or pathology texts discussing multiple specimens or species.
"The study compared the adenohypophyses of several mammalian species under electron microscopy."
Your 'master gland' has a master of its own — but the adenohypophysis earns its title by making at least six hormones that run everything from your growth to your milk supply.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of adenohypophysis
The word combines two Greek elements: 'adeno-', from 'adēn' meaning gland, and 'hypophysis', from 'hypo-' (under) plus 'physis' (growth), an ancient term for an outgrowth growing from below. The compound was coined in modern scientific Latin to distinguish the glandular anterior lobe of the pituitary from the neural posterior lobe, the neurohypophysis. It shares its roots with medical terms such as adenoma and adenoid (from 'adēn') and with hypophysis itself.
Related word forms
How adenohypophysis is actually used
A technical term used almost exclusively in anatomy, physiology, endocrinology, and medical education; in general writing, 'anterior pituitary' or 'anterior pituitary gland' is far more common. The adjective forms 'adenohypophysial' and 'adenohypophyseal' both appear in the literature, with 'adenohypophyseal' somewhat more frequent in American usage.
Easily confused with adenohypophysis
The neurohypophysis is the posterior lobe of the pituitary, which stores and releases hypothalamic hormones like oxytocin and vasopressin, whereas the adenohypophysis is the anterior lobe, which synthesizes and secretes its own hormones.
The hypothalamus is a region of the brain that controls the pituitary via releasing hormones, while the adenohypophysis is the hormone-secreting anterior portion of the pituitary itself.