Wiktionary
gram-positive
a. (context medicine bacteriology of a bacterium English) That is stained violet by Gram's method alt. (context medicine bacteriology of a bacterium English) That is stained violet by Gram's method
WordNet
gram-positive
adj. (of bacteria) being or relating to a bacterium that retains the violet stain used in Gram's method [ant: gram-negative]
Usage examples of "gram-positive".
Fearing the formation of an abscess somewhere inside the missile track, Ford took a sample of the exudate drained from the entry wound and was able to identify a gram-positive coccus, which the lab later narrowed down to Staphylococcus aureus through fluorescent antibody staining and a blood plasma coagulation test.