Actinal :: Actinal (a.) Pertaining to the part of a radiate animal which contains the mouth.
Actinaria :: Actinaria (n. pl.) 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 :: Acting (a.) Doing duty for another; officiating; as, an acting superintendent..
Actinia :: Actinia (n.) 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 :: Actinia (n.) A genus in the family Actinidae.
Actinic :: Actinic (a.) Of or pertaining to actinism; as, actinic rays..
Actiniform :: Actiniform (a.) Having a radiated form, like a sea anemone..
Actinism :: Actinism (n.) The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography..
Actinium :: Actinium (n.) 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 :: Actino-chemistry (n.) Chemistry in its relations to actinism.
Actinograph :: Actinograph (n.) An instrument for measuring and recording the variations in the actinic or chemical force of rays of light.
Actinoid :: Actinoid (a.) Having the form of rays; radiated, as an actinia..
Actinolite :: Actinolite (n.) A bright green variety of amphibole occurring usually in fibrous or columnar masses.
Actinolitic :: Actinolitic (a.) Of the nature of, or containing, actinolite..
Actinology :: Actinology (n.) The science which treats of rays of light, especially of the actinic or chemical rays..
Actinomere :: Actinomere (n.) One of the radial segments composing the body of one of the Coelenterata.
Actinometer :: Actinometer (n.) An instrument for measuring the direct heating power of the sun's rays.
Actinometer :: Actinometer (n.) An instrument for measuring the actinic effect of rays of light.
Actinometric :: Actinometric (a.) Pertaining to the measurement of the intensity of the solar rays, either (a) heating, or (b) actinic..
Actinometry :: Actinometry (n.) The measurement of the force of solar radiation.
Actinometry :: Actinometry (n.) The measurement of the chemical or actinic energy of light.
Actinophorous :: Actinophorous (a.) Having straight projecting spines.
Actinosome :: Actinosome (n.) The entire body of a coelenterate.
Actinost :: Actinost (n.) One of the bones at the base of a paired fin of a fish.