Par of exchange. See under Exchange.Par value, nominal value; face value.

(Par"a-) [Gr. para` beside; prob. akin to E. for- in forgive. Cf. For-.]

1. A prefix signifying alongside of, beside, beyond, against, amiss; as parable, literally, a placing beside; paradox, that which is contrary to opinion; parachronism.

2. (Chem.) A prefix denoting: (a) Likeness, similarity, or connection, or that the substance resembles, but is distinct from, that to the name of which it is prefixed; as paraldehyde, paraconine, etc.; also, an isomeric modification. (b) Specifically: (Organ. Chem.) That two groups or radicals substituted in the benzene nucleus are opposite, or in the respective positions 1 and 4; 2 and 5; or 3 and 6, as paraxylene; paroxybenzoic acid. Cf. Ortho-, and Meta-. Also used adjectively.

(||Pa*ra") n. [Turk., fr. Per. parah a piece.] A piece of Turkish money, usually copper, the fortieth part of a piaster, or about one ninth of a cent.

(Par`a*ban"ic) a. [Gr. to pass over.] (Chem.) Pertaining to, or designating, a nitrogenous acid which is obtained by the oxidation of uric acid, as a white crystalline substance (C3N2H2O3); — also called oxalyl urea.

(Par"a*blast) n. [Cf. Gr. to grow beside. See Para-, and -blast.] (Biol.) A portion of the mesoblast (of peripheral origin) of the developing embryo, the cells of which are especially concerned in forming the first blood and blood vessels. C. S. Minot.

(Par`a*blas"tic) a. (Biol.) Of or pertaining to the parablast; as, the parablastic cells.

(Par"a*ble) a. [L. parabilis, fr. parare to provide.] Procurable. [Obs.] Sir T. Browne.

(Par"a*ble), n. [F. parabole, L. parabola, fr. Gr. a placing beside or together, a comparing, comparison, a parable, fr. to throw beside, compare; para` beside + to throw; cf. Skr. gal to drop. Cf. Emblem, Gland, Palaver, Parabola, Parley, Parabole, Symbol.] A comparison; a similitude; specifically, a short fictitious narrative of something which might really occur in life or nature, by means of which a moral is drawn; as, the parables of Christ. Chaucer.

Declare unto us the parable of the tares.
Matt. xiii. 36.

Syn. — See Allegory, and Note under Apologue.

(Par"a*ble), v. t. To represent by parable. [R.]

Which by the ancient sages was thus parabled.

(Pa*rab"o*la) n.; pl. Parabolas [NL., fr. Gr. — so called because its axis is parallel to the side of the cone. See Parable, and cf. Parabole.] (Geom.) (a) A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus. (b) One of a group of curves defined by the equation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = &frac32. See under Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.

(||Pa*rab"o*le) n. [L., fr. Gr. . See Parable.] (Rhet.) Similitude; comparison.

(Par`a*bol"ic Par`a*bol"ic*al) a. [Gr. paraboliko`s figurative: cf. F. parabolique. See Parable.]

rank, etc.; as, their pretensions are on a par; his ability is on a par with his ambition.

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