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Actable
a.
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Capable of being acted.
Actinal
a.
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Pertaining to the part of a radiate animal which contains the mouth.
Actinaria
n. pl.
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A large division of Anthozoa, including those which have simple tentacles and do not form stony corals. Sometimes, in a wider sense, applied to all the Anthozoa, expert the Alcyonaria, whether forming corals or not.
Acting
a.
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Operating in any way.
Acting
a.
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Doing duty for another; officiating; as, an acting superintendent.
Actiniae
pl.
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of Actinia
Actinias
pl.
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of Actinia
Actinia
n.
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An animal of the class Anthozoa, and family Actinidae. From a resemblance to flowers in form and color, they are often called animal flowers and sea anemones. [See Polyp.].
Actinia
n.
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A genus in the family Actinidae.
Actinic
a.
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Of or pertaining to actinism; as, actinic rays.
Actiniform
a.
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Having a radiated form, like a sea anemone.
Actinism
n.
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The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.
Actinium
n.
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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.
Actino-chemistry
n.
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Chemistry in its relations to actinism.
Actinograph
n.
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An instrument for measuring and recording the variations in the actinic or chemical force of rays of light.
Actinoid
a.
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Having the form of rays; radiated, as an actinia.
Actinolite
n.
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A bright green variety of amphibole occurring usually in fibrous or columnar masses.
Actinolitic
a.
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Of the nature of, or containing, actinolite.
Actinology
n.
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The science which treats of rays of light, especially of the actinic or chemical rays.
Actinomere
n.
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One of the radial segments composing the body of one of the Coelenterata.
Actinometer
n.
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An instrument for measuring the direct heating power of the sun's rays.
Actinometer
n.
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An instrument for measuring the actinic effect of rays of light.
Actinometric
a.
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Pertaining to the measurement of the intensity of the solar rays, either (a) heating, or (b) actinic.
Actinometry
n.
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The measurement of the force of solar radiation.
Actinometry
n.
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The measurement of the chemical or actinic energy of light.
Actinophorous
a.
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Having straight projecting spines.
Actinosome
n.
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The entire body of a coelenterate.
Actinost
n.
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One of the bones at the base of a paired fin of a fish.
Actinostome
n.
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The mouth or anterior opening of a coelenterate animal.
Actinotrocha
n. pl.
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A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.