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.
Orthocarbonic
(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.
Orthocenter
(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.
Orthoceras
(||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.
Orthoceratite
(Or`tho*cer"a*tite) n. [Ortho- + Gr. a horn.] (Zoöl.) An orthoceras; also, any fossil shell
allied to Orthoceras.
Orthoclase
(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.
Orthoclastic
(Or`tho*clas"tic) a. (Crystallog.) Breaking in directions at right angles to each other; —
said of the monoclinic feldspars.
Orthodiagonal
(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.
Orthodome
(Or"tho*dome) n. [Ortho- + dome.] (Crystallog.) See the Note under Dome, 4.
Orthodox
(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.
3. Approved; conventional.
He saluted me on both cheeks in the orthodox manner.
H. R. Haweis. The term orthodox differs in its use among the various Christian communions. The Greek Church styles
itself the "Holy Orthodox Apostolic Church," regarding all other bodies of Christians as more or less
heterodox. The Roman Catholic Church regards the Protestant churches as heterodox in many points.
In the United States the term orthodox is frequently used with reference to divergent views on the doctrine
of the Trinity. Thus it has been common to speak of the Trinitarian Congregational churches in distinction
from the Unitarian, as Orthodox. The name is also applied to the conservative, in distinction from the
"liberal", or Hicksite, body in the Society of Friends. Schaff-Herzog Encyc.
Orthodoxal
(Or"tho*dox`al) a. Pertaining to, or evincing, orthodoxy; orthodox. [R.] Milton.
Orthodoxality
(Or`tho*dox*al"i*ty) n. Orthodoxness. [R.]
