| Actinopoda | A class of Sarcodina having slender pseudopodia with a central axial filament. Origin: actino-+ G. Pous, foot (05 Mar 2000) |
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| actinosin | 2-Amino-4,6-dimethyl-3-oxo-3H-phenoxazine-1,9-dicarboxylic acid;a phenoxazone derivative that is the chromophore of the actinomycins. (05 Mar 2000) |
| actinosome | <zoology> The entire body of a coelenterate. Origin: Gr. Ray + body. Source: Websters Dictionary (01 Mar 1998) |
| actinostome | <zoology> The mouth or anterior opening of a coelenterate animal. Origin: Gr, a ray + mouth. Source: Websters Dictionary (01 Mar 1998) |
| actinotherapy | In dermatology, ultraviolet light therapy. (05 Mar 2000) |
| actinotrocha | <zoology> A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles. Origin: NL.; Gr, a ray + a ring. Source: Websters Dictionary (01 Mar 1998) |
| actinozoa | <zoology> A group of Coelenterata, comprising the Anthozoa Ctenophora. The sea anemone, or actinia, is a familiar example. Origin: Gr, ray + animal. Source: Websters Dictionary (01 Mar 1998) |
| actinozoal | <zoology> Of or pertaining to the Actinozoa. Source: Websters Dictionary (01 Mar 1998) |
| actinozoon | <zoology> One of the Actinozoa. Source: Websters Dictionary (01 Mar 1998) |
| actinula | <zoology> A kind of embryo of certain hydroids (Tubularia), having a stellate form. Origin: NL, fr. Gr, a ray. Source: Websters Dictionary (01 Mar 1998) |