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.
Actinost :: Actinost (n.) One of the bones at the base of a paired fin of a fish.
Actinostome :: Actinostome (n.) The mouth or anterior opening of a coelenterate animal.
Actinotrocha :: Actinotrocha (n. pl.) A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles..
Actinozoa :: Actinozoa (n. pl.) A group of Coelenterata, comprising the Anthozoa and Ctenophora. The sea anemone, or actinia, is a familiar example..
Actinula :: Actinula (n. pl.) A kind of embryo of certain hydroids (Tubularia), having a stellate form..
Adamantine :: Adamantine (a.) Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains..
Adamantine :: Adamantine (a.) Like the diamond in hardness or luster.