Ogee arch (Arch.), a pointed arch, each of the sides of which has the
curve of an ogee, that is, has a reversed curve near the apex.
O*gee"chee lime` (?). [So named from the Ogeechee River in Georgia.]
(Bot.) (a) The acid, olive-shaped, drupaceous fruit of a species of
tupelo (Nyssa capitata) which grows in swamps in Georgia and Florida.
(b) The tree which bears this fruit.
Og`ga*ni"tion (?), n. [L. oggannire to snarl at; ob (see Ob-) + gannire
to yelp.] Snarling; grumbling. [R.] Bp. Montagu.
Og"ham (?), n. [Ir.] A particular kind of writing practiced by the
ancient Irish, and found in inscriptions on stones, metals, etc.
[Written also ogam.]
O"give (?), n. [F. ogive, OF. augive a pointed arch, LL. augiva a
double arch of two at right angles.] (Arch.) The arch or rib which
crosses a Gothic vault diagonally.
O"gle (g'l), v. t. [imp. & p. p. Ogled (?); p. pr. & vb. n. Ogling
(?).] [From a Dutch word corresponding to G. äugeln to ogle, fr. auge
eye; cf. D. ooglonken to ogle, OD. oogen to cast sheep's eyes upon,
ooge eye. See Eye.] To view or look at with side glances, as in
fondness, or with a design to attract notice.
And ogling all their audience, ere they speak.
Dryden.
O"gle, n. An amorous side glance or look. Byron.
O"gler (?), n. One who ogles. Addison.
O"gli*o (?), n. See Olio.
O"gre ("gr), n. [F., fr. Sp. ogro, fr. L. Orcus the god of the infernal
regions; also, the lower world, hell.] An imaginary monster, or hideous
giant of fairy tales, who lived on human beings; hence, any frightful
giant; a cruel monster.
His schoolroom must have resembled an ogre's den.
Maccaulay.
O"gre*ish, a. Resembling an ogre; having the character or appearance of
an ogre; suitable for an ogre. "An ogreish kind of jocularity."
Dickens.
O"gress (?), n. [F. ogresse. See Ogre.] A female ogre. Tennyson.
{ O"gre*ism (?), O"grism (?) }, n. The character or manners of an ogre.
O*gyg"i*an (*jj"*an), a. [L. Ogygius, Gr. 'Ogy`gios.] Of or pertaining
to Ogyges, a mythical king of ancient Attica, or to a great deluge in
Attica in his days; hence, primeval; of obscure antiquity.
Oh (), interj. [See O, interj.] An exclamation expressing various
emotions, according to the tone and manner, especially surprise, pain,
sorrow, anxiety, or a wish. See the Note under O.
Ohm (m), n. [So called from the German electrician, G. S. Ohm.] (Elec.)
The standard unit in the measure of electrical resistance, being the
resistance of a circuit in which a potential difference of one volt
produces a current of one ampére. As defined by the International
Electrical Congress in 1893, and by United States Statute, it is a
resistance substantially equal to 109 units of resistance of the C. G.
S. system of electro-magnetic units, and is represented by the
resistance offered to an unvarying electric current by a column of
mercury at the temperature of melting ice 14.4521 grams in mass, of a
constant cross-sectional area, and of the length of 106.3 centimeters.
As thus defined it is called the international ohm.
Ohm's law (Elec.), the statement of the fact that the strength or
intensity of an electrical current is directly proportional to the
electro-motive force, and inversely proportional to the resistance of
the circuit.
O*ho" (?), interj. An exclamation of surprise, etc.
-oid (-oid). [Gr. &?;, fr. e'i^dos form, akin to &?; to see, and E.
wit: cf.F. -oïde, L. - oïdes.] A suffix or combining form meaning like,
resembling, in the form of; as in anthropoid, asteroid, spheroid.
||O*ïd"i*um (?), n. [NL., dim. fr. Gr. w,'o`n egg.] (Bot.) A genus of
||minute fungi which form a floccose mass of filaments on decaying
||fruit, etc. Many forms once referred to this genus are now believed
||to be temporary conditions of fungi of other genera, among them the
||vine mildew (Oïdium Tuckeri), which has caused much injury to grapes.
Oil (oil), n. [OE. oile, OF. oile, F. huile, fr. L. oleum; akin to Gr.
&?;. Cf. Olive.] Any one of a great variety of unctuous combustible
substances, 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.
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 (Zoöl.), a bag, cyst, or gland in animals, containing oil. --
Oil beetle (Zoöl.), 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 cake. See under Cake. -- 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. -- 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) (Zoöl.) 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, Œnanthic ether.
See under Œnanthic. -- 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. Elæis Guineensis. See Elæis. -- Oil sardine (Zoöl.), an East
Indian herring (Clupea scombrina), valued for its oil. -- Oil shark
(Zoöl.) (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 (R.
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.
Oil (?), v. t. [imp. & p. p. Oiled (?); p. pr. & vb. n. Oiling.] To
smear or rub over with oil; to lubricate with oil; to anoint with oil.
Oil"bird` (?), n. (Zoöl.) See Guacharo.
Oil"cloth" (?), n. Cloth treated with oil or paint, and used for
marking garments, covering floors, etc.
Oiled (?), a. Covered or treated with oil; dressed with, or soaked in,
oil.
Oiled silk, silk rendered waterproof by saturation with boiled oil.
Oil"er (?), n. 1. One who deals in oils.