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Any one of several species of neuropterous insects of the genus Chrysopa and allied genera. They have delicate, lacelike wings and brilliant eyes. Their larvæ are useful in destroying aphids. Called also lace-winged fly, and goldeneyed fly.

An acid amide derived from lactic acid, and obtained as a white crystalline substance having a neutral reaction. It is metameric with alanine.

A white, crystalline substance, obtained from also, by extension, any similar substance.

A white, crystalline substance obtained as an anhydride of alanine, and regarded as an imido derivative of lactic acid.

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 substance, having a bitter taste and a neutral reaction, and forming one of the essential ingredients of lactucarium.

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

Shak. Fish ladder. See under Fish. -- Ladder beetle (Zoöl.), an American leaf beetle (Chrysomela scalaris). The elytra are silvery white, striped and spotted with green; the under wings are rose-colored. It feeds upon the linden tree. -- Ladder handle, an iron rail at the side of a vertical fixed ladder, to grasp wi…

Hydrous carbonate of lanthanum, found in tabular while crystals.

An alkaloid found in opium in small quantities, and extracted as a white crystalline substance.

Any young insect from the time that it hatches from the egg until it becomes a pupa, or chrysalis. During this time it usually molts several times, and may change its form or color each time. The larvæ of many insects are much like the adults in form and habits, but have no trace of wings, the rudimentary wings appeari…

Directed to the side; as, a lateral view of a thing. Lateral cleavage (Crystallog.), cleavage parallel to the lateral planes. -- Lateral equation (Math.), an equation of the first degree. [Obs.] -- Lateral line (Anat.), in fishes, a line of sensory organs along either side of the body, often marked by a distinct line…

derived from, the European bay or laurel (Laurus nobilis). Lauric acid (Chem.), a white, crystalline substance, C12H24O2, resembling palmitic acid, and obtained from the fruit of the bay tree, and other sources.

A white crystalline substance extracted from the fruit of the bay (Laurus nobilis), and consisting of a complex mixture of glycerin ethers of several organic acids.

A mineral of a light indigo-blue color, occurring in small masses, or in monoclinic crystals; blue spar. It is a hydrous phosphate of alumina and magnesia.

a glauca; -- probably so called from the glaucous color of the foliage. (b) (Chem.) Lead crystallized in arborescent forms from a solution of some lead salt, as by suspending a strip of zinc in lead acetate. -- Mock lead, a miner's term for blende. -- Red lead, a scarlet, crystalline, granular powder, consisting of m…

eaf beetle (Zoöl.), any beetle which feeds upon leaves; esp., any species of the family Chrysomelidæ, as the potato beetle and helmet beetle. -- Leaf bridge, a draw-bridge having a platform or leaf which swings vertically on hinges. -- Leaf bud (Bot.), a bud which develops into leaves or a leafy branch. -- Leaf butt…

ich is obtained from several varieties of lichen (Lecanora, Roccella, etc.), as a white, crystalline substance, and is called also orsellic, or diorsellinic acid, lecanorin, etc.

(Zoöl.), a yellow European sole (Solea aurantiaca). -- Salts of lemon (Chem.), a white crystalline substance, inappropriately named, as it consists of an acid potassium oxalate and contains no citric acid, which is the characteristic acid of lemon; -- called also salis of sorrel. It is used in removing ink stains. Se…

One of the higher alcohols of the paraffine series obtained from spermaceti as a white crystalline solid. It is so called because it occurs in the ethereal salt of lauric acid.