translate English to French: "antibiotic" means any substance or combination of substances prepared from certain micro-organisms, or which formerly was prepared from micro-organisms but is now made synthetically and which possesses inhibitory action on the growth of other microorganisms.
« antibiotique » désigne toute substance, ou combinaison de substances, préparée à partir de certains micro-organismes ou qui, l'ayant été auparavant mais étant maintenant synthétisée, a une action inhibitrice sur la croissance d'autres micro-organismes.