英语词源字典 - 在线词源网站

Gram stain [Gram stain 词源字典]: "A staining technique for the preliminary identification of bacteria, in which a violet dye is applied, followed by a decolorizing agent and then a red dye. The cell walls of certain bacteria (denoted Gram-positive) retain the first dye and appear violet, while those that lose it (denoted Gram-negative) appear red", Late 19th century: named after Hans C. J. Gram (1853–1938), the Danish physician who devised the method.[Gram stain etymology, Gram stain origin, 英语词源]
Actinomyces: "A genus of Gram-positive, facultatively anaerobic bacteria with rod-shaped and branching filamentous forms, which form part of the normal mucosal flora in mammals but may cause opportunistic infections. Also (in form actinomyces): a bacterium of this genus (also called ray fungus)", Late 19th cent. From scientific Latin Actinomyces, genus name from classical Latin actīno- + scientific Latin myces.