gentamicin: an antibiotic (trade name Garamycin) that is derived from an actinomycete; used in treating infections of the urinary tract
antibiotic: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections
hakka: a member of a people of southeastern China (especially Hong Kong, Canton, and Taiwan) who migrated from the north in the 12th century