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Lactic adj. (Physiol. Chem.) Of or pertaining to milk; procured from sour milk or whey; as, lactic acid; lactic fermentation, etc.

Lactic acid (Physiol. Chem.), a sirupy, colorless fluid, soluble in water, with an intensely sour taste and strong acid reaction. There is one center of optical activity, and this results in the observation of three isomeric modifications all having the formula C3H6O3; one is dextrorotatory (L-lactic acid), the other levorotatory (D-lactic acid), and the third an optically inactive mixture of the first two (DL-lactic acid); chemically it is 2-hydroxypropanoic acid. Sarcolactic acid or paralactic acid occurs chiefly in dead muscle tissue, while ordinary lactic acid (DL-lactic acid) results from fermentation, such as the fermentation of milk by lactic acid bacteria. The two acids are alike in having the same constitution (expressed by the name ethylidene lactic acid), but the latter is optically inactive, while sarcolactic acid rotates the plane of polarization to the right. The third acid, ethylene lactic acid, accompanies sarcolactic acid in the juice of flesh, and is optically inactive.

Lactic ferment, an organized ferment (Bacterium lacticum or Bacterium lactis), which produces lactic fermentation, decomposing the sugar of milk into carbonic and lactic acids, the latter, of which renders the milk sour, and precipitates the casein, thus giving rise to the so-called spontaneous coagulation of milk.

Lactic fermentation. See under Fermentation.

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Etymology of 'Lactic'

Collaborative International Dictionary of English 0.48

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"Lactic" Quotes from Famous Books

... them and giving off its oxygen and transuding its fluid elements into the tissues—with the result that an insufficient quantity of oxygenated blood reaches the heart to enable it to maintain an efficient circulation. As the sarco-lactic acid liberated in the muscles is not oxygenated a condition ...

— Manual of Surgery - Volume First: General Surgery. Sixth Edition. • Alexis Thomson and Alexander Miles

... man whose amorous lips incline, Full with young Eros' osculative sign, To the lorn maiden whose lact-albic hands, Drew albu-lactic wealth from lacteal glands Of that immortal bovine, by whose horn Distort, to realm ethereal was borne The beast catulean, vexer of that sly Ulysses quadrupedal, who made die The old mordacious Rat, that dared devour Antecedaneous Ale, in John's ...

— English as She is Wrote - Showing Curious Ways in which the English Language may be - made to Convey Ideas or obscure them. • Anonymous

... is soft. After a while it goes into a state of rigidity known as rigor mortis. Then it begins to soften again. This third stage is really a form of decay, called ripening. It is believed that the lactic acid formed is one of the principal agents producing this softening. Some people enjoy their meats, especially that of fowls and game, ripe enough to deserve the name of rotten. The ripening produces many chemical changes in the meat, which give the flesh more flavor. ...

— Maintaining Health • R. L. Alsaker

... consist of two quarts of water in which has been dissolved a teaspoonful of common table salt, or a tablespoonful of borax or boric acid. Such things like alum, potassium permanganate, carbolic acid, lactic acid, or tincture of iodine should only be used when there is leucorrhea present and generally only under a physician's directions. Bathing is permissible, but it is safe to use only a lukewarm bath. Cold tub baths, cold shower baths, as well as ocean and river bathing ...

— Woman - Her Sex and Love Life • William J. Robinson

... solution of Na2CO3. Na2CO3 H2O CO2 2 HNaCO3. Test a solution of it with litmus. Account for the result. Its use in bread-making depends on the ease with which CO2 is liberated. Even a weak acid, as the lactic acid of sour milk, sets this free, and thus causes ...

— An Introduction to Chemical Science • R.P. Williams

... SOUR MILK.—When soda is used with sour milk for leavening purposes, the lactic acid in the milk is so acted upon by the soda as to produce gas. However, these two ingredients—soda and sour milk—do not make an absolutely accurate leavening agent, because the quantity of acid in the sour milk varies according to the fermentation that has taken place. For example, sour milk ...

— Woman's Institute Library of Cookery, Vol. 1 - Volume 1: Essentials of Cookery; Cereals; Bread; Hot Breads • Woman's Institute of Domestic Arts and Sciences

... affected part and in giving vent at the earliest possible moment to whatever pus may be present. Free drainage should then be maintained. Apply dressings of lactic acid or inject with 5 per cent zinc-chlorid solution and pack with tampons of cotton soaked in antiseptic solutions. A laxative to keep the bowels moving freely is ...

— Special Report on Diseases of Cattle • U.S. Department of Agriculture

Words linked to "Lactic" : milk, lactic acid