Search the Dictionary

The fine impalpable soot obtained from the smoke of carbonaceous substances which have been only partly burnt, as in the flame of a smoking lamp. It consists of finely divided carbon, with sometimes a very small proportion of various impurities. It is used as an ingredient of printers' ink, and various black pigments a…

Pertaining to, or designating, a nitrogenous organic acid of the uric acid group, obtained by the decomposition of allantoin, and usually called allanturic acid.

A white organic base, resembling morphine, and obtained from certain varieties of opium.

ric acid (Chem.), a white, crystalline substance, C12H24O2, resembling palmitic acid, and obtained from the fruit of the bay tree, and other sources.

A place where gold is obtained by washing.

ent of solder and type metal. Atomic weight, 206.4. Symbol Pb (L. Plumbum). It is chiefly obtained from the mineral galena, lead sulphide.

Pertaining to, or designating, an organic acid which 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.

An organic base, C9H6.N.CH3, metameric with quinaldine, and obtained by the distillation of cinchonine.

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.

ch 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, certain papery green seaweeds of the genus…

A colorless, crystalline, organic base, obtained from rosaniline by reduction, and also from other sources. It forms colorless salts.

Pertaining to, or designating, an acid obtained from leucin, and called also oxycaproic acid.

colorless; specif. (Chem.), denoting an extensive series of colorless organic compounds, obtained by reduction from certain other colored compounds; as, leucaniline, leucaurin, etc.

Pertaining to, or designating, a complex organic acid, obtained as a yellowish white gum by the oxidation of croconic acid.

An arm on a rock shaft, to give motion to the shaft or to obtain motion from it. Compound lever, a machine consisting of two or more levers acting upon each other. -- Lever escapement. See Escapement. -- Lever jack. See Jack, n., 5. -- Lever watch, a watch having a vibrating lever to connect the action of the escape…

A substance resembling dextrin, obtained from the bulbs of the dahlia, the artichoke, and other sources, as a colorless, spongy, amorphous material. It is so called because by decomposition it yields levulose. [Written also lævulin.]

Pertaining to, or denoting, an acid (called also acetyl- propionic acid), C5H8O3, obtained by the action of dilute acids on various sugars (as levulose). [Written also lævulinic.]

An unfermentable carbohydrate obtained by gently heating levulose.

A sirupy variety of sugar, rarely obtained crystallized, occurring widely in honey, ripe fruits, etc., and hence called also fruit sugar. It is called levulose, because it rotates the plane of polarization to the left. [Written also lævulose.]C6H12O6.

of woody, fibrous cells, and is, therefore, the part from which the fiber of the plant is obtained, as that of hemp, etc. Liber cells, elongated woody cells found in the liber.