n. 1. a neurotransmitter released by the transmitting dendron at autononmous synapses and at neuromuscular junctions. It is a quaternary amine with an obligatory negative counterion. The nominal formula for the hydroxide form is C7H17NO3. Structural formula (CH3)3N(+)CH2CH2.O.CO.CH3.OH(-). Acetylcholine is the first recognized and best-studied of the neurotransmitters. At receptors it is recycled into choline by the action of acetylcholinesterase. Acetylcholinesterase inhibitors therefore function as nerve poisons. For biochemical studies it is prepared typically in the chloride or bromide forms. [ WordNet 1.5 +PJC ]

n. 1. an enzyme which exists in nerve cells and hydrolyses acetylcholine into choline and acetic acid. It is essential for neurotransmission at autonomous synapses and neuromuscular junctions, and its inhibition by acetylcholinesterase inhibitors can paralyze or kill an animal.
Syn. -- ACE [ PJC ]

. In devices generating heat, such as gasoline-engine motor vehicles, the cooling of the device by increasing its radiating surface by means of ribs or radiators, and placing it so that it is exposed to a current of air. Cf. Water cooling. -- Air"-cooled`, a. [Webster 1913 Suppl. +PJC]

n. [ Gr. &unr_; soot. ] (Chem.) A peculiar acrid and bitter oil, obtained from wood soot. [ 1913 Webster ]

n. [ Perh. allied to band. ] A glutinous pomatum for the hair. [ 1913 Webster ]

n. (Chem.) (a) Same as Benzole. (b) Same as Amarine. [ R. ] Watts. [ 1913 Webster ]

n. (Zool.) An American singing bird (Dolichonyx oryzivorus). The male is black and white; the female is brown; -- called also, ricebird, reedbird, and Boblincoln. [ 1913 Webster ]

The happiest bird of our spring is the bobolink. W. Irving. [ 1913 Webster ]

{ } a. [ L. capitolinus: cf. F. capitolin. ] Of or pertaining to the Capitol in Rome. “Capitolian Jove.” Macaulay. [ 1913 Webster ]

Capitoline games (Antiq.), annual games instituted at Rome by Camillus, in honor of Jupiter Capitolinus, on account of the preservation of the Capitol from the Gauls; when reinstituted by Domitian, after a period of neglect, they were held every fifth year. [ 1913 Webster ]

a. [ L. capreolus wild goat, fr. caper goat. ] (Zool.) Of or pertaining to the roebuck. [ 1913 Webster ]

n. [ L. Carolus Charles. ] A former gold coin of Germany worth nearly five dollars; also, a gold coin of Sweden worth nearly five dollars. [ 1913 Webster ]

(Bot.) See Pinkboot. [ 1913 Webster ]

{ , n. [ F. carin; cf. It. carlino; -- so called from Carlo (Charles) VI. of Naples. ] A silver coin once current in some parts of Italy, worth about seven cents. Simmonds. [ 1913 Webster ]

n. A coin. See Carline. [ 1913 Webster ]

n. A song of joy or devotion; a singing, as of carols. Coleridge. [ 1913 Webster ]

Such heavenly notes and carolings. Spenser. [ 1913 Webster ]

n. A native or inhabitant of north or South Carolina. [ 1913 Webster ]

n. An instrument for drawing lines through a point, or lines converging to a center. [ 1913 Webster ]

a. [ L. centrum + linea line. ] Converging to a center; -- applied to lines drawn so as to meet in a point or center. [ 1913 Webster ]

n. [ NL. chinium quinine (see Chinoldine) + L. oleum oil + -ine. ] (Chem.) See Quinoline. [ 1913 Webster ]

n. [ Gr. &unr_; bile. ] (Physiol. Chem.) See Neurine. [ 1913 Webster ]

{ } a. [ Gr. &unr_;, from &unr_; bile. ] (Physiol. Chem.) Pertaining to, or obtained from, the bile. [ 1913 Webster ]

Cholic acid (Chem.), a complex organic acid found as a natural constituent of taurocholic and glycocholic acids in the bile, and extracted as a resinous substance, convertible under the influence of ether into white crystals. [ 1913 Webster ]

n. [ Cinnamic + quinoline. ] A nitrogenous organic base, C8H6N2, analogous to quinoline, obtained from certain complex diazo compounds. [ 1913 Webster ]

n. [ It. cippollino, prop., a little onion, fr. cipolla onion (cf. E. cibol). So called because its veins consist, like onions, of different strata, one lying upon another. ] (Min.) A whitish marble, from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc. [ 1913 Webster ]

n. [ F. colin; prop. a dim. of Colas, contr. fr. Nicolas Nicholas. ] (Zool.) The American quail or bobwhite. The name is also applied to other related species. See Bobwhite. [ 1913 Webster ]

n. a genus of birds including the New World quail and the bobwhites.
Syn. -- genus Colinus. [ WordNet 1.5 ]

a. Adapted to console or comfort; cheering; as, this is consoling news. [ 1913 Webster ]

p. a. Adapted to cool and refresh; allaying heat. “The cooling brook.” Goldsmith. [ 1913 Webster ]

Cooling card, something that dashes hopes. [ Obs. ] --
Cooling time (Law), such a lapse of time as ought, taking all the circumstances of the case in view, to produce a subsiding of passion previously provoked. Wharton. [ 1913 Webster ]

n. [ Prob. fr. cosmetic + L. oleum oil. ] (Chem.) A substance obtained from the residues of the distillation of petroleum, essentially the same as vaseline, but of somewhat stiffer consistency, and consisting of a mixture of the higher paraffines; a kind of petroleum jelly. [ 1913 Webster ]

n. [ F., fr. crin hair, L. crinis. ] 1. A kind of stiff cloth, used chiefly by women, for underskirts, to expand the gown worn over it; -- so called because originally made of hair. [ 1913 Webster ]

2. A lady's skirt made of any stiff material; latterly, a hoop skirt. [ 1913 Webster ]

a. Dentilingual. [ 1913 Webster ]

n. (Chem.) One of several isomeric organic bases of the quinoline series of alkaloids. [ 1913 Webster ]

n. [ Gr. 'ekbolh` a throwing out; 'ek out + ba`llein to throw. ] (Chem.) An alkaloid constituting the active principle of ergot; -- so named from its power of producing abortion. [ 1913 Webster ]

n. [ Gr. &unr_; insect. ] (Chem.) See Chitin. [ 1913 Webster ]

n. (Chem.) A glucoside found in the bearberry (and others of the Ericaceæ), and extracted as a bitter, yellow, amorphous mass. [ 1913 Webster ]

n. [ See Etiolate. ] (Bot.) A yellowish coloring matter found in plants grown in darkness, which is supposed to be an antecedent condition of chlorophyll. Encyc. Brit. [ 1913 Webster ]

n. [ F.; cf. It. francolino, Sp. francolin. ] (Zool.) A spurred partidge of the genus Francolinus and allied genera, of Asia and Africa. The common species (F. vulgaris) was formerly common in southern Europe, but is now nearly restricted to Asia. [ 1913 Webster ]

n. [ NL. See Gadolinite. ] (Chem.) A rare earth associated with yttria and regarded as the oxide (Gd2O3) of a metallic element, gadolinium. [ Webster 1913 Suppl. ]

a. (Chem.) Pertaining to or containing gadolinium. [ 1913 Webster ]

n. [ Named after Gadolin, a Russian chemist. ] (Min.) A mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron. [ 1913 Webster ]

n. [ NL. See Gadolinite. ] (Chem.) A rare earth metallic element of the Lanthanide series, with a characteristic spectrum, found associated with yttrium and other rare earth elements. Symbol, Gd; it has an atomic number of 64, an atomic weight of 157.25 (C=12.011), and a valence of +3. [ 1913 Webster +PJC ]

n. A highly volatile mixture of fluid hydrocarbons, obtained mostly from petroleum, as also by the distillation of bituminous coal. It is used as a fuel for most automobiles and for many other vehicles with internal combustion engines. The gasoline of commerce is typically blended with additives to improve its performance in internal combustion engines. Gasoline was also used in the early 1900's in making air gas, and in giving illuminating power to water gas. See Carburetor.
Syn. -- petrol[ Brit ]. [ 1913 Webster +PJC ]

{ or }. (Mach.) A kind of internal-combustion engine; -- in British countries called usually petrol engine. [ Webster 1913 Suppl. ]

‖n. [ It., from giallo yellow, prob. fr. OHG. gelo, G. gelb; akin to E. yellow. ] A term variously employed by early writers on art, though commonly designating the yellow oxide of lead, or massicot. Fairholt. [ 1913 Webster ]

n. (Chem.) One of the essential principles of the hedge hyssop (Gratiola officinalis). [ 1913 Webster ]

n. See Haematoin. [ 1913 Webster ]

n. [ AS. hālignes. ] 1. The state or quality of being holy; perfect moral integrity or purity; freedom from sin; sanctity; innocence. [ 1913 Webster ]

Who is like thee, glorious in holiness! Ex. xv. 11. [ 1913 Webster ]

2. The state of being hallowed, or consecrated to God or to his worship; sacredness. [ 1913 Webster ]

Israel was holiness unto the Lord. Jer.ii.3. [ 1913 Webster ]

His holiness, a title of the pope; -- formerly given also to Greek bishops and Greek emperors.

Syn. -- Piety; devotion; godliness; sanctity; sacredness; righteousness. [ 1913 Webster ]

n. [ See Hole a hollow. ] (Mining) Undercutting in a bed of coal, in order to bring down the upper mass. Raymond. [ 1913 Webster ]

pos>n. The practise of providing formal education, especially primary or secondary education, at home rather than in a school. [ PJC ]

n. A crystalline amino acid (C5H9NO3), a hydroxylated proline, obtained by hydrolysis of gelatin or collagen. Chemically it is 4-hydroxy-L-proline. It is classified as nonessential for growth in rats. [ WordNet 1.5 +PJC ]

n. [ See Indol. ] (Chem.) A dark resinous substance, polymeric with indol, and obtained by the reduction of indigo white. [ 1913 Webster ]

n. [ Iridescent + L. oleum oil. ] (Chem.) A nitrogenous base C10H9N, extracted from coal-tar naphtha, as an oily liquid. It is a member of the quinoline series, and is probably identical with lepidine.