| actinin | <chemical> A protein factor that regulates the length of r-actin. It is chemically similar, but immunochemically distinguishable from actin. Chemical name: Actinins, alpha- (12 Dec 1998) |
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| actinism | The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography. Origin: Gr, ray. Source: Websters Dictionary (01 Mar 1998) |
| actinium | <chemistry> 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. Origin: Gr, ray. Source: Websters Dictionary (01 Mar 1998) |
| actino- | Combining form meaning a ray, as of light; applied to any form of radiation or to any structure with radiating parts. See: radio-. Origin: G. Aktis, aktinos, a ray of light, a beam. (05 Mar 2000) |
| actino-chemistry | Chemistry in its relations to actinism. Source: Websters Dictionary (01 Mar 1998) |
| actinobacillosis | A disease characterised by suppurative and granulomatous lesions in the respiratory tract, upper alimentary tract, skin, kidneys, joints, and other tissues. Actinobacillus lignieresii infects cattle and sheep while a. Equuli infects horses and pigs. (12 Dec 1998) |
| actinobacillus | A genus of pasteurellaceae described as gram-negative, nonsporeforming, nonmotile, facultative anaerobes. most members are found both as pathogens and commensal organisms in the respiratory, alimentary, and genital tracts of animals. (12 Dec 1998) |
| actinobacillus actinomycetemcomitans | A species of gram-negative, facultatively anaerobic spherical or rod-shaped bacteria that associates with species of actinomyces in actinomycotic lesions. (12 Dec 1998) |
| Actinobacillus equuli | A species causing suppurative lesions, particularly in the kidneys and joints in foals and piglets, and endocarditis in pigs. (05 Mar 2000) |
| actinobacillus infections | Infections with bacteria of the genus actinobacillus. (12 Dec 1998) |
| Actinobacillus lignieresii | A species producing infections of the upper alimentary tract and mouth in cattle and swine (actinobacillosis) and suppurative lesions in the skin and lungs of sheep; it is the type species of its genus. (05 Mar 2000) |
| actinobacillus pleuropneumoniae | A species of gram-negative, facultatively anaerobic coccobacillus-shaped bacteria that has been isolated from pneumonic lesions and blood. It produces pneumonia with accompanying fibrinous pleuritis in swine. (12 Dec 1998) |
| actinobacteria group | A group of gram-positive, heterogeneous bacteria. This group encompasses a range of morphologically, physiologically, and chemically different organisms and includes bacteria that form cocci, short rods, irregular rods, and mycelia that fragment. (12 Dec 1998) |
| actinodermatitis | An obsolete term for adverse reaction of skin to radiation therapy (ultraviolet, X-ray, or radium); more commonly, radiodermatitis. Synonym: photodermatitis. Origin: actino-+ G. Derma, skin, + -itis, inflammation (05 Mar 2000) |
| actinogram | An obsolete synonym for radiograph. (05 Mar 2000) |