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From The Collaborative International Dictionary of English v.0.48 [gcide]:
Oil \Oil\ (oil), noun [OE. oile, OF. oile, F. huile, fr. L. oleum; akin to Gr. ?. Cf. {Olive}.] Any one of a great variety of unctuous combustible substances, more viscous than and not miscible with water; as, olive oil, whale oil, rock oil, etc. They are of animal, vegetable, or mineral origin and of varied composition, and they are variously used for food, for solvents, for anointing, lubrication, illumination, etc. By extension, any substance of an oily consistency; as, oil of vitriol.
Note: The mineral oils are varieties of petroleum. See {Petroleum}. The vegetable oils are of two classes, {essential oils} (see under {Essential}), and {natural oils} which in general resemble the animal oils and fats. Most of the natural oils and the animal oils and fats consist of ethereal salts of glycerin, with a large number of organic acids, principally stearic, oleic, and palmitic, forming respectively stearin, olein, and palmitin. Stearin and palmitin prevail in the solid oils and fats, and olein in the liquid oils. Mutton tallow, beef tallow, and lard are rich in stearin, human fat and palm oil in palmitin, and sperm and cod-liver oils in olein. In making soaps, the acids leave the glycerin and unite with the soda or potash.
{Animal oil}, {Bone oil}, {Dipple's oil}, etc. (Old Chem.), a complex oil obtained by the distillation of animal substances, as bones. See {Bone oil}, under {Bone}.
{Drying oils}, {Essential oils}. (Chem.) See under {Drying}, and {Essential}.
{Ethereal oil of wine}, {Heavy oil of wine}. (Chem.) See under {Ethereal}.
{Fixed oil}. (Chem.) See under {Fixed}.
{Oil bag} (Zool.), a bag, cyst, or gland in animals, containing oil.
{Oil beetle} (Zool.), any beetle of the genus {Meloe} and allied genera. When disturbed they emit from the joints of the legs a yellowish oily liquor. Some species possess vesicating properties, and are used instead of cantharides.
{Oil box}, or {Oil cellar} (Mach.), a fixed box or reservoir, for lubricating a bearing; esp., the box for oil beneath the journal of a railway-car axle.
{Oil cock}, a stopcock connected with an oil cup. See {Oil cup}.
{Oil color}. (a) A paint made by grinding a coloring substance in oil. (b) Such paints, taken in a general sense. (b) a painting made from such a paint.
{Oil cup}, a cup, or small receptacle, connected with a bearing as a lubricator, and usually provided with a wick, wire, or adjustable valve for regulating the delivery of oil.
{Oil engine}, a gas engine worked with the explosive vapor of petroleum.
{Oil gas}, inflammable gas procured from oil, and used for lighting streets, houses, etc.
{Oil gland}. (a) (Zool.) A gland which secretes oil; especially in birds, the large gland at the base of the tail. (b) (Bot.) A gland, in some plants, producing oil.
{Oil green}, a pale yellowish green, like oil.
{Oil of brick}, empyreumatic oil obtained by subjecting a brick soaked in oil to distillation at a high temperature, -- used by lapidaries as a vehicle for the emery by which stones and gems are sawn or cut. --Brande & C.
{Oil of talc}, a nostrum made of calcined talc, and famous in the 17th century as a cosmetic. [Obs.] --B. Jonson.
{Oil of vitriol} (Chem.), strong sulphuric acid; -- so called from its oily consistency and from its forming the vitriols or sulphates.
{Oil of wine}, [OE]nanthic ether. See under {[OE]nanthic}.
{Oil painting}. (a) The art of painting in oil colors. (b) Any kind of painting of which the pigments are originally ground in oil.
{Oil palm} (Bot.), a palm tree whose fruit furnishes oil, esp. {Elaeis Guineensis}. See {Elaeis}.
{Oil sardine} (Zool.), an East Indian herring ({Clupea scombrina}), valued for its oil.
{Oil shark} (Zool.) (a) The liver shark. (b) The tope.
{Oil still}, a still for hydrocarbons, esp. for petroleum.
{Oil test}, a test for determining the temperature at which petroleum oils give off vapor which is liable to explode.
{Oil tree}. (Bot.) (a) A plant of the genus {Ricinus} ({Ricinus communis}), from the seeds of which castor oil is obtained. (b) An Indian tree, the mahwa. See {Mahwa}. (c) The oil palm.
{To burn the midnight oil}, to study or work late at night.
{Volatle oils}. See {Essential oils}, under {Essential}.
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Oil \Oil\, verb (used with an object) [imp. & p. p. {Oiled}; p. pr. & vb. n. {Oiling}.] To smear or rub over with oil; to lubricate with oil; to anoint with oil.
From WordNet (r) 3.0 (2006) [wn]:
noun
1: a slippery or viscous liquid or liquefiable substance not miscible with water
2: oil paint containing pigment that is used by an artist [syn: {oil}, {oil color}, {oil colour}]
3: a dark oil consisting mainly of hydrocarbons [syn: {petroleum}, {crude oil}, {crude}, {rock oil}, {fossil oil}, {oil}]
4: any of a group of liquid edible fats that are obtained from plants [syn: {vegetable oil}, {oil}]
verb
1: cover with oil, as if by rubbing; "oil the wooden surface"
2: administer an oil or ointment to ; often in a religious ceremony of blessing [syn: {anoint}, {inunct}, {oil}, {anele}, {embrocate}]
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Definitions retrieved from the Open Source DICT Webster's English and WordNet 3.0 dictionaries. Click here for database copyright information.
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