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A pseudomorphous crystal, as a crystal consisting of quartz, but having the cubic form of fluor spar, the fluor crystal having been changed to quartz by a process of substitution.

The fourth part; the quarter. [Obs.] Sir T. Browne.

An aspect of the heavenly bodies in which they are distant from each other 90º, or the quarter of a circle; quartile. See the Note under Aspect, 6.

The position of one heavenly body in respect to another when distant from it 90º, or a quarter of a circle, as the moon when at an equal distance from the points of conjunction and opposition. Quadrature of the moon (Astron.), the position of the moon when one half of the disk is illuminated. -- Quadrature of an orbit…

The offspring of a mulatto and a white person; a person quarter-blooded. [Written also quarteron, quarteroon, and quateron.]

ral containing only positive integral powers of the variables, and called quadric, cubic, quartic, etc., according as it is of the second, third, fourth, fifth, or a higher degree. These are further called binary, ternary, quaternary, etc., according as they contain two, three, four, or more variables; thus, the quanti…

See 2d Quarteron.

Same as Quarterfoil.

A quartet; -- applied chiefly to instrumental compositions.

The embryonic sac of an ovule, sometimes regarded as an innermost fifth integument. Cf. Quartine, and Tercine.

The neck and spine of a fore quarter of veal or mutton.

A large vein of auriferous quartz; -- so called in Australia. Hence, any body of rock yielding valuable ore. Reef builder (Zoöl.), any stony coral which contributes material to the formation of coral reefs. -- Reef heron (Zoöl.), any heron of the genus Demigretta; as, the blue reef heron (D.jugularis) of Australia.…

those of the isometric system. A uniaxial crystal is said to be optically positive (like quartz), or optically negative (like calcite), or to have positive, or negative, double refraction, according as the optic axis is the axis of least or greatest elasticity for light; a biaxial crystal is similarly designated when…

One of the grand districts or quarters into which any space or surface, as of the earth or the heavens, is conceived of as divided; hence, in general, a portion of space or territory of indefinite extent; country; province; district; tract. If thence he 'scappe, into whatever world, Or unknown region. Milton.…

signals again; specifically, to communicate, by repeating them, the signals shown at headquarters.

apparatus which, upon pressure of a spring, will indicate the time, usually in hours and quarters.

ving regard; hence, of good repute; not mean; as, a respectable citizen. "The respectable quarter of Sicca." J. H. Newman. No government, any more than an individual, will long be respected, without being truly respectable. Madison.

of the character that stands for such silence. They are named as notes are, whole, half, quarter,etc. Rest house, an empty house for the accomodation of travelers; a caravansary. [India] -- To set, or To set up, one's rest, to have a settled determination; -- from an old game of cards, when one so expressed his intent…

A quartzose trachyte, an igneous rock often showing a fluidal structure. -- Rhy`o*lit"ic, a.

A turning directly about by the right, so as to face in the opposite direction; also, the quarter directly opposite; as, to turn to the right-about. To send to the right-about, to cause to turn toward the opposite point or quarter; -- hence, of troops, to cause to turn and retreat. [Colloq.] Sir W. Scott.…