What does cortin mean?
Cortin is an obsolete scientific term that once referred to the active hormonal principle of the adrenal cortex — the outer layer of the adrenal glands sitting atop the kidneys. In the early decades of endocrinology, researchers observed that animals whose adrenal glands were removed could be kept alive only with extracts of the cortex, and the mysterious life-maintaining agent in those extracts became known as cortin. As chemistry advanced, this single label gave way to the specific corticosteroid hormones we know today, including cortisol, corticosterone, and aldosterone, which regulate metabolism, salt balance, and the stress response. The word derives from Latin cortex, meaning "bark" or "rind," reflecting the cortex's position as an outer layer, and it was occasionally extended to thin, curtain-like membranes in anatomical description. Today cortin survives mainly as a historical curiosity in older textbooks and journals, a linguistic fossil marking the era when physiology knew what a hormone did long before chemistry could name it precisely.
nounAn obsolete name for the hormone or hormones secreted by the adrenal cortex, later identified with corticosteroids such as corticosterone; it has also been applied to certain delicate, curtain-like anatomical membranes.
- The active hormonal principle of the adrenal cortex, so named before the individual corticosteroids were chemically identified (historical/obsolete usage).
- A thin, curtain-like membrane or structure in anatomy.
"Early twentieth-century physiologists believed that extracts containing cortin were essential for life in adrenalectomized animals."
"Researchers of the 1930s debated whether cortin was a single substance or a mixture of several steroid hormones."
"The surgeon described a delicate cortin of tissue spanning the cavity."
"Cortin" sounds like a stage curtain, and early anatomists did borrow the image — but the word's biggest role was as medicine's first name for the life-saving hormones of the adrenal cortex.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cortin
Cortin comes from Latin cortex (genitive corticis), meaning "bark" or "outer rind," the same root that yields cortex and cortical. The term was coined in early twentieth-century medical literature to denote the active principle of the adrenal cortex, following the established pattern of adding the suffix -in to a source organ or tissue when naming an extracted substance. Once the individual corticosteroid hormones were isolated and named, cortin fell out of professional use.
How cortin is actually used
Cortin is chiefly of historical interest: modern endocrinology uses precise terms such as cortisol, corticosterone, and aldosterone instead. It appears almost exclusively in older medical and scientific literature.
Easily confused with cortin
A curtain is a fabric hanging used to cover a window or stage, whereas cortin is an obsolete physiological term naming adrenal-cortex hormones (or certain thin anatomical membranes).
The cortex is the outer layer of an organ such as the brain or adrenal gland, while cortin names the hormonal secretion associated with the adrenal cortex.