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The measurement of the chemical or actinic energy of light. Abney.

A chronic infectious disease of cattle and man due to the presence of Actinomyces bovis. It causes local suppurating tumors, esp. about the jaw. Called also lumpy jaw or big jaw. -- Ac`ti*no*my*cot"ic (#), a.

An apparatus for the production of sound by the action of the actinic, or ultraviolet, rays.

Pertaining to, or causing the production of, sound by means of the actinic, or ultraviolet, rays; as, actinophonic phenomena.

Having straight projecting spines.

The entire body of a coelenterate.

(Anat.) One of the bones at the base of a paired fin of a fish.

The mouth or anterior opening of a coelenterate animal.

A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.

A group of Coelenterata, comprising the Anthozoa Ctenophora. The sea anemone, or actinia, is a familiar example.

Of or pertaining to the Actinozoa.

One of the Actinozoa.

A kind of embryo of certain hydroids (Tubularia), having a stellate form.

A process 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.…

That may be the subject of an action or suit at law; as, to call a man a thief is actionable.

In an actionable manner.

A shareholder in joint-stock company. [Obs.]

Void of action.

To make active. [Obs.]

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.