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A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light.

Chemistry in its relations to actinism. Draper.

A record made by the actinograph.

An instrument for measuring and recording the variations in the actinic or chemical force of rays of light. Nichol.

Having the form of rays; radiated, as an actinia.

A bright green variety of amphibole occurring usually in fibrous or columnar masses.

Of the nature of, or containing, actinolite.

The science which treats of rays of light, especially of the actinic or chemical rays.

One of the radial segments composing the body of one of the Coelenterata.

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

Pertaining to the measurement of the intensity of the solar rays, either (a) heating, or (b) actinic.

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.