Technical term used in international law and arms-control contexts. The 1972 Biological Weapons Convention (《
禁止生物武器公约》, Jìnzhǐ Shēngwù Wǔqì Gōngyuē) bans these. Compare
化学战剂 (huàxuézhànjì, chemical warfare agent) and
神经性毒剂 (shénjīngxìng dújì, nerve agent).