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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 are at least three isomeric modifications all having the formula C3H6O3. Sarcolact…

Bearing or containing milk or a milky fluid; as, the lactiferous vessels, cells, or tissue of various vascular plants.

Producing or yielding milk.

A medicine to check the secretion of milk, or to dispel a supposed accumulation of milk in any part of the body.

The albumin present on milk, apparently identical with ordinary serum albumin. It is distinct from the casein of milk.

An instrument for determining the amount of butter fat contained in a given sample of milk.

A form of hydrometer, specially graduated, for finding the density of milk, and thus discovering whether it has been mixed with water or some of the cream has been removed.

An instrument for estimating the purity or richness of milk, as a measuring glass, a specific gravity bulb, or other apparatus.

Pertaining to, or designating, an acid obtained by the oxidation of milk sugar (lactose).

A peculiar albuminous body considered a normal constituent of milk.

Lactiferous. [Obs.] "Lactory or milky plants." Sir T. Browne.

An instrument for estimating the amount of cream contained in milk by ascertaining its relative opacity.

Sugar of milk or milk sugar; a crystalline sugar present in milk, and separable from the whey by evaporation and crystallization. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called lactin.

A white, crystalline, tasteless substance, found in the milky sap of species of Lactuca, and constituting an essential ingredient of lactucarium.

d something. About the paper . . . I lapped several times a slender thread of very black silk. Sir I. Newton.

A milky or colored juice in certain plants in cavities (called latex cells or latex tubes). It contains the peculiar principles of the plants, whether aromatic, bitter, or acid, and in many instances yields caoutchouc upon coagulation.

hose caterpillar makes a nest by rolling up a leaf and fastening the edges together with silk, as if sewn; esp., Phoxopteris nubeculana, which feeds upon the apple tree. -- Leaf sight, a hinges sight on a firearm, which can be raised or folded down. -- Leaf trace (Bot.), one or more fibrovascular bundles, which may b…

Coagulated sour milk diluted with water; -- a common beverage among the Arabs. Also, a fermented liquor made of the same.

Lactuca (L. sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, from which lactucarium is obtained. The commonest wild lettuce of the United States is L. Canadensis. Hare's lettuce, Lamb's lettuce. See under Hare, and Lamb. -- Lettuce opium. See Lactucarium. -- Sea lettuce, certa…

A stout twilled silk fabric, formerly made in the Levant.