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Of, pertaining to, or like, opal in appearance; having changeable colors like those of the opal.

ituated over against or in front; facing; -- often with to; as, a house opposite to the Exchange.

c.), also from extract of aloes, and artificially from certain derivatives of toluene. It changes readily into orcein.

offspring of a moment of doubt on the part of Ormazd. Ormazd is attended by angels and archangels. He is represented as a bearded man inclosed in a winged circle, a conception probably derived from the Assyrian representations of Ashur.

y or fluctuate between fixed limits; to act or move in a fickle or fluctuating manner; to change repeatedly, back and forth. The amount of superior families oscillates rather than changes, that is, it fluctuates within fixed limits. Dc Quincey.

Fluctuation; variation; change back and forth. His mind oscillated, undoubtedly; but the extreme points of the oscillation were not very remote. Macaulay. Axis of oscillation, Center of oscillation. See under Axis, and Center.

An instrument for showing visually the changes in a varying current; an oscillograph.

Capable of producing bone; having the power to change cartilage or other tissue into bone.

The state of being changed into a bony substance; also, a mass or point of ossified tissue.

Changed to bone or something resembling bone; hardened by deposits of mineral matter of any kind; -- said of tissues.

To form into bone; to change from a soft animal substance into bone, as by the deposition of lime salts.

To leaven too much; hence, to change excessively; to spoil. [Obs.]

The science which explains, by the law of causation, the past condition and changes of the earth. -- Pa*læ`ti*o*log"ic*al, a.

An outer garment; a cloak mantle. His lion's skin changed to a pall of gold. Spenser.

Negotiable evidences of indebtedness; notes; bills of exchange, and the like; as, the bank holds a large amount of his paper.

, their pretensions are on a par; his ability is on a par with his ambition. -- Par of exchange. See under Exchange. -- Par value, nominal value; face value.

s which are added to the ordinary forms of words, to express additional emphasis, or some change in the sense.

inal mark or note, set in the margin to call attention to something in the text, e. g., a change of subject; now, the character

arallax, the greatest value of the heliocentric parallax, or the greatest annual apparent change of place of a body as seen from the earth and sun; as, the annual parallax of a fixed star. -- Binocular parallax, the apparent difference in position of an object as seen separately by one eye, and then by the other, the…

A kind of pseudomorph, in which there has been a change of physical characters without alteration of chemical composition, as the change of aragonite to calcite.