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te lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed. -- Achromatic prism. See Prism. --…

ter, and reddening of vegetable blue or violet colors. They are also characterized by the power of destroying the distinctive properties of alkalies or bases, combining with them to form salts, at the same time losing their own peculiar properties. They all contain hydrogen, united with a more negative element or radic…

ination. The very acme and pitch of life for epic poetry. Pope. The moment when a certain power reaches the acme of its supremacy. I. Taylor.

The measuring of the power or extent of hearing.

That which is done or doing; the exercise of power, or the effect, of which power exerted is the cause; a performance; a deed. That best portion of a good man's life, His little, nameless, unremembered acts Of kindness and of love. Wordsworth. Hence, in specific uses:

An instrument for measuring the direct heating power of the sun's rays.

or condition of acting or moving, as opposed to rest; the doing of something; exertion of power or force, as when one body acts on another; the effect of power exerted on one body by another; agency; activity; operation; as, the action of heat; a man of action. One wise in council, one in action brave. Pope.…

Having the power or quality of acting; causing change; communicating action or motion; acting; -- opposed to Ant: passive, that receives; as, certain active principles; the powers of the mind.

Having lost the power of development, and become rotten, as eggs; putrid. Hence: Unfruitful or confused, as brains; muddled. Dryden.

Equal to some requirement; proportionate, or correspondent; fully sufficient; as, powers adequate to a great work; an adequate definition. Ireland had no adequate champion. De Quincey.

To determine in the exercise of judicial power; to decide or award judicially; to adjudicate; as, the case was adjudged in the November term.

A deliberate determination by the judicial power; a judicial decision or sentence. "An adjudication in favor of natural rights." Burke.

Power or permission to enter; admittance; entrance; access; power to approach. What numbers groan for sad admission there! Young.

Permission to enter; the power or right of entrance; also, actual entrance; reception. To gain admittance into the house. South. He desires admittance to the king. Dryden. To give admittance to a thought of fear. Shak.

Having power to advise; containing advice; as, an advisory council; their opinion is merely advisory. The General Association has a general advisory superintendence over all the ministers and churches. Trumbull.

Considerable debility of the vital powers, as in typhoid fever. Dunglison.

Pertaining to, or characterized by, debility of the vital powers; weak.

A power-driven, heavier-than-air flying machine.

thers and in conversation; complaisant behavior. Affability is of a wonderful efficacy or power in procuring love. Elyot

Made up of terms involving different powers of the unknown quantity; adfected; as, an affected equation.