n. [ L. acer sharp + olēre to smell. ] (Chem.) A limpid, colorless, highly volatile liquid, obtained by the dehydration of glycerin, or the destructive distillation of neutral fats containing glycerin. Its vapors are intensely irritating. Watts. [ 1913 Webster ]

n. [ Cf. F. brésiline. See 2d Brazil. ] (Chem.) A substance, C16H14O5, extracted from brazilwood as a yellow crystalline powder which is white when pure. It is colored intensely red by alkalies on exposure to the air, being oxidized to C16H12O5, to which brazilwood owes its dyeing properties. [ Webster 1913 Suppl. ]

n. [ L. caeruleus sky-blue. ] (Chem.) A fast dyestuff, C20H8O6, made by heating gallein with strong sulphuric acid. It dyes mordanted fabrics green. [ Webster 1913 Suppl. ]

n. [ See Erythroleic. ] (Chem.) A red substance obtained from litmus. [ 1913 Webster ]

n. (Chem.) A white crystalline alkaloid, extracted from sassy bark (Erythrophleum Guineense).

‖n. sing. & pl. [ G., dim. of frau woman. See Frau. ] In Germany, a young lady; an unmarried woman; -- as a title, equivalent to Miss. [ Webster 1913 Suppl. ]

n. [ Pyrogallol + phthaleïn. ] (Chem.) A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids. [ 1913 Webster ]

prop. n. A battle of World War II (January 1944); American forces landed and captured a Japanese airbase. [ WordNet 1.5 ]

n. [ Pref. met- + acrolein. ] (Chem.) A polymeric modification of acrolein obtained by heating it with caustic potash. It is a crystalline substance having an aromatic odor. [ 1913 Webster ]

n. [ OE. moleyn, AS. molegn. ] (Bot.) Any plant of the genus Verbascum. They are tall herbs having coarse leaves, and large flowers in dense spikes. The common species, with densely woolly leaves, is Verbascum Thapsus. [ 1913 Webster ]

Moth mullein. See under Moth. --
Mullein foxglove, an American herb (Seymeria macrophylla) with coarse leaves and yellow tubular flowers with a spreading border. --
Petty mullein, the cowslip. Dr. Prior. [ 1913 Webster ]

n. [ Gr. myda^n to be clammy (from decay). ] (Physiol. Chem.) A toxic alkaloid (ptomaine) obtained from putrid flesh and from herring brines. As a poison it is said to execute profuse diarrhoea, vomiting, and intestinal inflammation. Brieger. [ 1913 Webster ]

n. (Physiol. Chem.) A constituent of the nuclei of all cells, containing protein and nucleic acid. It is a colorless amorphous substance, readily soluble in alkaline fluids and especially characterized by its comparatively large content of phosphorus. It also contains nitrogen and sulphur. [ 1913 Webster +PJC ]

n. [ L. oleum oil: cf. F. oléine. ] (Physiol. Chem.) A fat, liquid at ordinary temperatures, but solidifying at temperatures below 0° C., found abundantly in both the animal and vegetable kingdoms (see Palmitin). It dissolves solid fats, especially at 30-40° C. Chemically, olein is a glyceride of oleic acid; and, as three molecules of the acid are united to one molecule of glycerol to form the fat, it is technically known as triolein. It is also called elain. [ 1913 Webster ]

or ., n. (Chem.) A white or yellowish white crystalline substance, C20H14O4, formed by condensation of the anhydride of phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids. This reaction, being very delicate, is used as a pH indicator. It is sometimes used as a laxative in veterinary medicine. [ Webster 1913 Suppl. +PJC ]

n. [ See Phthalic. ] (Chem.) One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenolphthalein. Their alkaline solutions are fluorescent. [ 1913 Webster ]

Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Same as phenolphthalein. [ 1913 Webster + PJC ]

a. Plan. [ Obs. ] Chaucer. [ 1913 Webster ]

v. i. & t. To complain. See Plain. [ Obs. ] [ 1913 Webster ]

a. [ OF. & F., fr. L. plenus. ] Full; complete. [ Obs. ] “Plein remission.” Chaucer. -- Plein"ly, adv. [1913 Webster]

n. [ L. ricinus castor-oil plant + oleum oil. ] (Chem.) The glycerin salt of ricinoleic acid, occuring as a characteristic constituent of castor oil; -- formerly called palmin. [ 1913 Webster ]

a. Sullen; sad. [ Obs. ] Spenser. [ 1913 Webster ]

n. [ F., fr. L. terra earth + planus even, level, plain. ] 1. (Fort.) The top, platform, or horizontal surface, of a rampart, on which the cannon are placed. See Illust. of Casemate. [ 1913 Webster ]

2. (Civ. Engin.) An embankment of earth with a broad level top, which is sometimes excavated to form a continuation of an elevated canal across a valley. [ Webster 1913 Suppl. ]

n. [ Pref. tri- + olein. ] (Physiol. Chem.) See Olein. [ 1913 Webster ]

n. (Feudal Law) See Villain, 1. [ 1913 Webster ]