Or"pine (?), n. [F. orpin the genus of plants which includes orpine; --
so called from the yellow blossoms of a common species (Sedum acre).
See Orpiment.] (Bot.) A low plant with fleshy leaves (Sedum telephium),
having clusters of purple flowers. It is found on dry, sandy places,
and on old walls, in England, and has become naturalized in America.
Called also stonecrop, and live-forever. [Written also orpin.]
Or"rach (?), n. See Orach.
Or"re*ry (?), n.; pl. Orreries (#). [So named in honor of the Earl of
Orrery.] An apparatus which illustrates, by the revolution of balls
moved by wheelwork, the relative size, periodic motions, positions,
orbits, etc., of bodies in the solar system.
Or"ris (?), n. [Prob. corrupted from It. ireos iris. See Iris.] (Bot.)
A plant of the genus Iris (I. Florentina); a kind of flower-de- luce.
Its rootstock has an odor resembling that of violets.
Orris pea (Med.), an issue pea made from orris root. -- Orris root, the
fragrant rootstock of the orris.
Or"ris (?), n. 1. [Contr. from orfrays, or from arras.] A sort of gold
or silver lace. Johnson.
2. A peculiar pattern in which gold lace or silver lace is worked;
especially, one in which the edges are ornamented with conical figures
placed at equal distances, with spots between them.
{ Orse"dew (?), Or"se*due (?), } n. Leaf metal of bronze; Dutch metal.
See under Dutch.
||Or`seille" (?), n. [F.] See Archil.
Or*sel"lic (?), a. [From F. orseille archil. See Archil.] (Chem.)
Pertaining to, or designating, an acid found in certain lichens, and
called also lecanoric acid. [Formerly written also orseillic.]
Or`sel*lin"ic (?), a. (Chem.) Pertaining to, or designating, an organic
acid obtained by a partial decomposition of orsellic acid as a white
crystalline substance, and related to protocatechuic acid.
Ort (?), n.; pl. Orts (#). [Akin to LG. ort, ortels, remnants of food,
refuse, OFries. ort, OD. oorete, ooraete; prob. from the same prefix as
in E. ordeal + a word akin to eat.] A morsel left at a meal; a
fragment; refuse; -- commonly used in the plural. Milton.
Let him have time a beggar's orts to crave.
Shak.
Or`ta*lid"i*an (?), n. (Zoöl.) Any one of numerous small two-winged
flies of the family Ortalidæ. The larvæ of many of these flies live in
fruit; those of others produce galls on various plants.
Or"thid (?), n. (Zoöl.) A brachiopod shell of the genus Orthis, and
allied genera, of the family Orthidæ.
||Or"this (ôr"ths), n. [NL., fr. Gr. 'orqo`s straight.] (Zoöl.) An
||extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
Or"thite (?), n. [Gr. &?; straight.] (Min.) A variety of allanite
occurring in slender prismatic crystals.
Or"tho- (?). [Gr. &?; straight; akin to Skr. &?;rdhva upright, vrdh to
grow, to cause to grow.]
1. A combining form signifying straight, right, upright, correct,
regular; as, orthodromy, orthodiagonal, orthodox, orthographic.
2. (Chem.) A combining form (also used adjectively), designating: (a)
(Inorganic Chem.) The one of several acids of the same element (as the
phosphoric acids), which actually occurs with the greatest number of
hydroxyl groups; as, orthophosphoric acid. Cf. Normal. (b) (Organic
Chem.) Connection with, or affinity to, one variety of isomerism,
characteristic of the benzene compounds; -- contrasted with meta- or
para-; as, the ortho position; hence, designating any substance showing
such isomerism; as, an ortho compound.
In the graphic representation of the benzene nucleus (see Benzene
nucleus, under Benzene), provisionally adopted, any substance
exhibiting double substitution in adjacent and contiguous carbon atoms,
as 1 & 2, 3 & 4, 4 & 5, etc., is designated by ortho-; as, orthoxylene;
any substance exhibiting substitution of two carbon atoms with one
intervening, as 1 & 3, 2 & 4, 3 & 5, 4 & 6, etc., by meta-; as,
resorcin or metaxylene; any substance exhibiting substitution in
opposite parts, as 1 & 4, 2 & 5, 3 & 6, by para-; as, hydroquinone or
paraxylene.
Or`tho*car*bon"ic (?), a. [Ortho- + carbonic.] (Chem.) Designating a
complex ether, C.(OC2H5)4, which is obtained as a liquid of a pleasant
ethereal odor by means of chlorpicrin, and is believed to be a
derivative of the hypothetical normal carbonic acid, C.(OH)4.
Or`tho*cen"ter (?), n. [Ortho- + center.] (Geom.) That point in which
the three perpendiculars let fall from the angles of a triangle upon
the opposite sides, or the sides produced, mutually intersect.
||Or*thoc"e*ras (?), n. [NL., fr. Gr. 'orqo`s straight + &?; a horn.]
||(Paleon.) An extinct genus of Paleozoic Cephalopoda, having a long,
||straight, conical shell. The interior is divided into numerous
||chambers by transverse septa.
Or`tho*cer"a*tite (?), n. [Ortho- + Gr. &?;, &?;, a horn.] (Zoöl.) An
orthoceras; also, any fossil shell allied to Orthoceras.
Or"tho*clase (?), n. [Ortho- + Gr. &?; to break.] (Min.) Common or
potash feldspar crystallizing in the monoclinic system and having two
cleavages at right angles to each other. See Feldspar.
Or`tho*clas"tic (?), a. (Crystallog.) Breaking in directions at right
angles to each other; -- said of the monoclinic feldspars.
Or`tho*di*ag"o*nal (?), n. [Ortho- + diagonal.] (Crystallog.) The
diagonal or lateral axis in a monoclinic crystal which is at right
angles with the vertical axis.
Or"tho*dome (?), n. [Ortho- + dome.] (Crystallog.) See the Note under
Dome, 4.
Or"tho*dox (?), a. [L. orthodoxus, Gr. 'orqo`doxos; 'orqo`s right, true
+ do`xa opinion, dokei^n to think, seem; cf. F. orthodoxe. See Ortho-,
Dogma.] 1. Sound in opinion or doctrine, especially in religious
doctrine; hence, holding the Christian faith; believing the doctrines
taught in the Scriptures; -- opposed to heretical and heterodox; as, an
orthodox Christian.
2. According or congruous with the doctrines of Scripture, the creed of
a church, the decree of a council, or the like; as, an orthodox
opinion, book, etc.