| actinograph | An instrument for measuring and recording the variations in the actinic or chemical force of rays of light. Origin: Gr, ray + -graph. Source: Websters Dictionary (01 Mar 1998) |
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| actinohematin | A red respiratory pigment found in certain forms of Actinia (sea anemones). Origin: actino-+ G. Haima, blood (05 Mar 2000) |
| actinoid | Having the form of rays; radiated, as an actinia. Origin: Gr, ray. Source: Websters Dictionary (01 Mar 1998) |
| actinolite | <chemical> A bright green variety of amphibole occurring usually in fibrous or columnar masses. Origin: Gr, ray. Source: Websters Dictionary (01 Mar 1998) |
| actinolitic | <chemical> Of the nature of, or containing, actinolite. Source: Websters Dictionary (01 Mar 1998) |
| actinology | <study> The science which treats of rays of light, especially of the actinic or chemical rays. Origin: Gr, ray. (04 Mar 1998) |
| Actinomadura | A genus of aerobic, Gram-positive, non-acid-fast fungi where filaments fragment into spores. Actinomadura pelletieri is an agent of mycetoma. Origin: actino-+ Madura, India (05 Mar 2000) |
| Actinomadura africana | A species found in a case of mycetoma of the foot in South Africa. (05 Mar 2000) |
| Actinomadura madurae | A member of the Eumycetes (true fungi); one of the aetiologic agents of Madura foot and actiomycotic mycetoma. (05 Mar 2000) |
| actinomere | <zoology> One of the radial segments composing the body of one of the Coelenterata. Origin: Gr, ray + part. Source: Websters Dictionary (01 Mar 1998) |
| actinometry | 1. The measurement of the force of solar radiation. 2. The measurement of the chemical or actinic energy of light. Source: Websters Dictionary (01 Mar 1998) |
| actinomorphic | <botany> Of flowers: symmetrical about more than one vertical plane. (09 Oct 1997) |
| actinomycelial | Relating to the mycelium-like filaments of the Actinomycetales. (05 Mar 2000) |
| actinomyces | <microbiology> A genus of gram-positive, rod-shaped bacteria whose organisms are nonmotile. Filaments that may be present in certain species are either straight or wavy and may have swollen or clubbed heads. (12 Dec 1998) |
| Actinomyces bovis | A species of bacteria causing actinomycosis in cattle; infection in humans is not established; it is the type species of its genus. (05 Mar 2000) |