bioweapon       
noun [ C ] uk/ˈbaɪ.əʊˌwep.ən/ us/ˌbaɪ.oʊˈwep.ən/
 生物武器
a living substance, such as bacteria, used to intentionally cause damage or death to people, animals, or crops
  The highly infectious plague bacterium has been seen as a possible bioweapon. 高传染性的鼠疫细菌已被视为一种可能的生物武器。 
 A future bioweapon attack could involve antibiotic-resistant strains of anthrax. 未来的生物武器攻击可能涉及对抗生素具有耐药性的炭疽病菌株。 
 Synonym: biological weapon
 - More examples
 - Even after polio is eradicated, vaccinations might still be needed to protect against use of manmade polio as a bioweapon.
 - Soon we may see early-warning devices that are set off by the presence of nerve gas or a bioweapon.
 - They signed a 1972 agreement to end bioweapon production.
 - The protocol will strengthen international norms against bioweapon development and use.