Search the Dictionary

An animal of the class Anthozoa, and family Actinidæ. From a resemblance to flowers in form and color, they are often called animal flowers and sea anemones. [See Polyp.].

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

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.

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 force of solar radiation. Maury.

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.

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 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.