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uthority of; to give recognition to. In all thy ways acknowledge Him. Prov. iii. 6. By my soul, I'll ne'er acknowledge thee. Shak.

Something given or done in return for a favor, message, etc. Smollett.

An isolated point not upon a curve, but whose coördinates satisfy the equation of the curve so that it is considered as belonging to the curve.

Pertaining to the sense of hearing, the organs of hearing, or the science of sounds; auditory. Acoustic duct, the auditory duct, or external passage of the ear. -- Acoustic telegraph, a telegraph making audible signals; a telephone. -- Acoustic vessels, brazen tubes or vessels, shaped like a bell, used in ancient the…

In relation to sound or to hearing. Tyndall.

The science of sounds, teaching their nature, phenomena, and laws. Acoustics, then, or the science of sound, is a very considerable branch of physics. Sir J. Herschel.

a man can speak on any subject, it is necessary to be acquainted with it. Locke. A man of sorrows and acquainted with grief. Isa. liii. 3.

A state of being acquainted; acquaintance. Southey.

; to accept or consent by silence or by omitting to object; -- followed by in, formerly also by with and to. They were compelled to acquiesce in a government which they did not regard as just. De Quincey.

Acquired. [Obs.] He died not in his acquisitive, but in his native soil. Wotton.

claim or debt; to clear off; to pay off; to requite. A responsibility that can never be absolutely acquitted. I. Taylor.

A quality of bodies which corrodes or destroys others; also, a harsh or biting sharpness; as, the acrimony of the juices of certain plants. [Archaic] Bacon.

The use of a picture symbol of an object to represent phonetically the initial sound of the name of the object.

The use of a picture symbol of an object to represent phonetically the initial sound of the name of the object.

e sprout at the end of a seed when it begins to germinate; the plumule in germination; -- so called from its spiral form.

The end of a verse or psalm, or something added thereto, to be sung by the people, by way of a response.

ther ornaments, placed on the apex and at the basal angles of a pediment. Acroteria are also sometimes placed upon the gables in Gothic architecture. J. H. Parker.

of a legislative body, council, court of justice, etc.; a decree, edit, law, judgment, resolve, award; as, an act of Parliament, or of Congress.

on of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.

The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.