ブロムシアンMeanings1nouncyanogen bromidechemistry›A chemical compound (BrCN) used in organic synthesis and protein cleavage. The Japanese term is a direct borrowing from German.from German BromcyanSee also: 臭化シアンブロムシアンはタンパク質しつの切せつ断だんに用もちいられる。Cyanogen bromide is used for protein cleavage.