gramicidin

noun Pharmacology.

1. a crystalline, water-insoluble antibiotic obtained from tyrothrycin by extraction, used chiefly in treating local infections caused by Gram-positive organisms.

noun

1. an antibiotic used in treating local Gram-positive bacterial infections: obtained from the soil bacterium Bacillus brevis

n.

1. An antibiotic produced by a Bacillis bacterium and used to treat certain gram-positive bacteria infections.