Ogham, Ogam, og′am, n. an ancient Irish writing, in straight lines crossing each other; one of the characters, twenty in number, of which it is formed.—adjs. Ogh′amic, Og′amic.
Ogive, ō′jiv, n. (archit.) a pointed arch or window.—adj. Ogī′val. [Fr.,—Sp.,—Ar. áwj, summit.]
Ogle, ō′gl, v.t. to look at fondly with side glances.—v.i. to cast amorous glances.—ns. O′gle; O′gler; O′gling. [Dut. oogen—ooge, the eye.]
Ogre, ō′gėr, n. a man-eating monster or giant of fairy tales:—fem. O′gress.—adj. O′greish. [Fr. ogre—Sp. ogro—L. orcus, the lower world.]
Ogygian, ō-jij′i-an, adj. pertaining to the mythical Attic king Ogўges, prehistoric, primeval.
Oh, ō, interj. denoting surprise, pain, sorrow, &c.
Ohm, ōm, n. the unit by which electrical resistance is measured, being nearly equal to that caused by a thousand feet of copper wire one-tenth of an inch in diameter.—Ohm's law (see Law). [Georg Simon Ohm, a German electrician, 1787-1854.]
Oidium, ō-id′i-um, n. a genus of parasitic fungi, including the vine-mildew, &c. [Gr. ōon, an egg.]
Oil, oil, n. the juice from the fruit of the olive-tree: any greasy liquid.—v.t. to smear or anoint with oil.—ns. Oil′bag, a bag or cyst in animals containing oil; Oil′cake, a cake made of flax seed from which the oil has been pressed out; Oil′cloth, a painted floorcloth; Oil′-col′our, a colouring substance mixed with oil; Oil′er, one who, or that which, oils: an oil-can: (coll.) a coat of oilskin; Oil′ery, the commodities of an oil-man; Oil′-gas, illuminating gas or heating gas made by distilling oil in closed retorts; Oil′iness; Oil′-man, one who deals in oils; Oil′-mill, a grinding-mill for expressing oil from seeds, nuts, &c.; Oil′nut, the butter-nut of North America; Oil′-paint′ing, a picture painted in oil-colours: the art of painting in oil-colours; Oil′-palm, a palm whose fruit-pulp yields palm-oil; Oil′-press, a machine for expressing oils from seeds or pulp; Oil′skin, cloth made waterproof by means of oil: a garment made of oilskin; Oil′-spring, a spring whose water contains oily matter: a fissure or area from which petroleum, &c. oozes; Oil′stone, a fine-grained kind of stone used, when wetted with oil, for sharpening tools; Oil′-well, a boring made for petroleum.—adj. Oil′y, consisting of, containing, or having the qualities of oil: greasy.—Strike oil (see Strike). [O. Fr. oile (Fr. huile)—L. oleum—Gr. elaion—elaia, the olive.]