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One who does; one performs or executes; one who is wont and ready to act; an actor; an agent. The doers of the law shall be justified. Rom. ii. 13.

To be forced along; to be impelled; to be moved by any physical force or agent; to be driven. The hull drives on, though mast and sail be torn. Byron. The chaise drives to Mr. Draper's chambers. Thackeray.

; the power of uninterrupted or long continuance in any condition; the power of resisting agents or influences which tend to cause changes, decay, or dissolution; lastingness. A Gothic cathedral raises ideas of grandeur in our minds by the size, its height, . . . its antiquity, and its durability. Blair.…

is conferred; as in assignee, donee, alienee, grantee, etc. It is correlative to -or, the agent or doer.

In general: That which is produced by an agent or cause; the event which follows immediately from an antecedent, called the cause; result; consequence; outcome; fruit; as, the effect of luxury. The effect is the unfailing index of the amount of the cause. Whewell.

Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer. "Of noxious efficacy." Milton.

An efficient cause; a prime mover. God . . . moveth mere natural agents as an efficient only. Hooker.

The branch of medical science which treats of the applications agent.

An agent employed to advance, in a covert manner, the interests of his employers; one sent out by any power that is at war with another, to create dissatisfaction among the people of the latter. Buzzing emissaries fill the ears Of listening crowds with jealousies and fears. Dryden.

Anything used to effect a purpose; any device or contrivance; an agent. Shak. You see the ways the fisherman doth take To catch the fish; what engines doth he make Bunyan. Their promises, enticements, oaths, tokens, and all these engines of lust. Shak.

An epulotic agent.

The termination of many English words, denoting the agent; -- applied either to men or things; as in hater, farmer, heater, grater. At the end of names of places, -er signifies a man of the place; as, Londoner, i. e., London man.

lium or spawn of this fungus infecting grains of rye and wheat. It is a powerful remedial agent, and also a dangerous poison, and is used as a means of hastening childbirth, and to arrest bleeding.

liquid by the action of sulphiric acid on alcohol. It appears to be the active catalytic agent in the process of etherification.

nce used in preparing remedies as a vehicle or medium of administration for the medicinal agents. Chambers.

An agent or influence which arouses vital activity, or produces increased action, in a living organism or in any of its tissues or parts; a stimulant.

A written official recognition of a consul or commercial agent, issued by the government to which he is accredited, and authorizing him to exercise his powers in the place to which he is assigned.

An exfoliative agent. Wiseman.

under which they occur; this is observation; or, secondly, by putting in action causes or agents over which we have control, and purposely varying their combinations, and noticing what effects take place; this is experiment. Sir J. Herschel.

An instrument or agent causing explosion; an exploder; also, an explosive.