streptococcus (n.)youdaoicibaDictgodict[streptococcus 词源字典]
bacteria genus, 1877, Modern Latin, coined by Viennese surgeon Albert Theodor Billroth (1829-1894) from strepto- "twisted" + Modern Latin coccus "spherical bacterium," from Greek kokkos "berry" (see cocco-). So called because the bacteria usually form chains.[streptococcus etymology, streptococcus origin, 英语词源]