Steroid (redirected from Steriods)

steroid /ster·oid/ (ster´oid) any of a group of lipids with a specific 7-carbon-atom ring system as a nucleus, such as progesterone, adrenocortical and gonadal hormones, bile acids, sterols, toad poisons, and some carcinogenic hydrocarbons.steroi´dal

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anabolic steroid  any of a group of synthetic derivatives of testosterone having pronounced anabolic properties and relatively weak androgenic properties; they are used clinically mainly to promote growth and repair of body tissues in diseases or states promoting catabolism or tissue wasting.

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ster·oid (stroid, stîr-)

n.

Any of numerous naturally occurring or synthetic fat-soluble organic compounds having as a basis 17 carbon atoms arranged in four rings and including the sterols and bile acids, adrenocortical and sex hormones, certain natural drugs such as digitalis compounds, and the precursors of certain vitamins. Also called steroid hormone.

adj. or ste·roid·al (st-roidl, st-)

Relating to or characteristic of steroids or steroid hormones.

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Steroid

A natural body substance that often is given to women before delivering a very premature infant to stimulate the fetal lungs to produce surfactant, hopefully preventing RDS (or making it less severe).

Mentioned in: Barbiturate-Induced Coma, Hypersensitivity Pneumonitis, Respiratory Distress Syndrome

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steroid (ster´oid),

n a group name for compounds that resemble cholesterol chemically and also contain a hydrogenated cyclopentanoperhydrophenanthrene ring system. Included are cholesterol, ergosterol, bile acids, vitamin D, sex hormones, adrenocortical hormones, and cardiac glycosides.

steroid, 11-oxy,

n the C-21 corticosteroids, all of which are oxygenated at carbon 11.

steroid, 17 α-hydroxycortico- (17-OHCS),

n term used for cortisol and other 21-carbon steroids possessing a dihydroxyacetone group at carbon 17. Serum and urinary determinations give a direct measurement of adrenocortical activity.

steroid, 17-keto- (17-KS),

n steroidal compounds with a ketone (carbonyl) group at carbon 17. Derived from cortisol and adrenal and testicular androgen. Urinary neutral 17-ketosteroids represent the catabolic end products of the endocrine glands. Produced by the adrenal cortex and testes. Increased values occur in adrenogenital syndromes, adrenocortical carcinoma, bilateral hyperplasia of the adrenal cortex, and Leydig cell tumors. Normal adult values for a 24-hour urine sample are 10 to 20 mg for men and 5 to 15 mg for women.

steroid, adrenocortical (adrenal corticosteroid),

n 1. a hormone extracted from the adrenal cortex or a synthetic substance similar in chemical structure and biologic activity to such a hormone.
2. the biologically active steroid of the adrenal cortex, which include 11-dehydrocorticosterone (compound A), corticosterone (compound B), cortisone (compound E), 17 α-hydroxycorticosterone (compound F, hydroxycortisone, or cortisol), and aldosterone. The effects of the corticosteroids include increased resorption of sodium and chloride by the renal tubules and metabolic effects on protein, carbohydrate, and fat.

steroid, C-19 cortico- (anabolic protein, N hormone),

n adrenocortical hormones similar in action to the male and female sex hormones. They cause nitrogen retention and, in excessive amounts, masculinization in the female.

steroid, C-21 cortico- (glycogenic steroid, sugar hormone),

n 21-carbon adrenocortical hormones that are oxygenated at carbon 11 or at both carbon 11 and 17. They affect protein, carbohydrate, and fat metabolism; e.g., they elevate blood sugar, increase glyconeogenesis, decrease hepatic lipogenesis, mobilize depot fat, and increase protein metabolism.

steroid, glycogenic,

n See steroid, C-21 cortico-.

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steroid

a complex molecule containing carbon atoms in four interlocking rings forming a hydrogenated cyclopentophenanthrene-ring system; three of the rings contain six carbon atoms each and the fourth contains five.

Steroid derivatives are important in body chemistry. Among them are the male and female sex hormones, such as testosterone and estrogen, and the hormones of the cortices of the adrenal glands, including cortisone. Vitamins of the D group are steroids involved in calcium metabolism. The cardiac glycosides, a group of compounds derived from certain plants, are partly steroids. Sterols, including cholesterol, are steroids. Cholesterol is the main building block of steroid hormones in the body; it is also converted into bile salts by the liver.

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steroid I

alfaxalone.

steroid II

alfadolone.

steroid diabetes

see steroid diabetes mellitus.

steroid hormones

see androgenic steroids, corticosteroid, glucocorticoid, mineralocorticoid, anabolic steroid.