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Freedom from spherical aberration.

Devoid of air; free from air; as, an apneumatic lung; also, effected by or with exclusion of air; as, an apneumatic operation.

A prefix from a Greek preposition. It usually signifies from, away from, off, or asunder, separate; as, in apocope (a cutting off), apostate, apostle (one sent away), apocarpous.

Free from chromatic and spherical aberration; -- said esp. of a lens in which rays of three or more colors are brought to the same focus, the degree of achromatism thus obtained being more complete than where two rays only are thus focused, as in the ordinary achromatic objective. --Ap`o*chro"ma*tism (#), n.…

An alkaloid, , prepared from codeine. In its effects it resembles apomorphine.

equivocal; mythic; fictitious; spurious; false. The passages . . . are, however, in part from apocryphal or fictitious works. Sir G. C. Lewis.

A bitter principle obtained from the dogbane (Apocynum cannabinum).

se or conclusion in a conditional sentence, expressing the result, and thus distinguished from the protasis or clause which expresses a condition. Thus, in the sentence, "Though he slay me, yet will I trust in him," the former clause is the protasis, and the latter the apodosis.

That point in the orbit of the moon which is at the greatest distance from the earth.

Bending away from the ground; -- said of leaves, etc. Darwin.

An effervescing alkaline mineral water used as a table beverage. It is obtained from a spring in Apollinarisburg, near Bonn.

espondent apologized for not answering my letter. To apologize for his insolent language. Froude.

A crystalline alkaloid obtained from morphia. It is a powerful emetic.

h cover, invest, and the terminations and attachments of, many muscles. They often differ from tendons only in being flat and thin. See Fascia.

Designed to facilitate discharges of phlegm or mucus from mouth or nostrils. -- n.

An abandonment of what one has voluntarily professed; a total desertion of departure from one's faith, principles, or party; esp., the renunciation of a religious faith; as, Julian's apostasy from Christianity.

To apostatize. [Obs.] We are not of them which apostate from Christ. Bp. Hall.

or principles once held, or the party to which one has previously adhered. He apostatized from his old faith in facts, took to believing in Carlyle.

A brief letter dimissory sent by a court appealed from to the superior court, stating the case, etc.; a paper sent up on appeals in the admiralty courts. Wharton. Burrill. Apostles' creed, a creed of unknown origin, which was formerly ascribed to the apostles. It certainly dates back to the beginning of the sixth centu…

egular and uninterrupted transmission of ministerial authority by a succession of bishops from the apostles to any subsequent period. Hook.