解释1):A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms.由真菌,细菌和其它微生物产生或从中得到的一种物质,如青霉素或链霉素,可以破坏或抑制其它微生物的生长。
解释2):a substance produced by or a semisynthetic substance derived from a microorganism and able in dilute solution to inhibit or kill another microorganism