生物恐怖主义就是恐怖主义涉及有意释放或传播的生物制剂（细菌、病毒或毒素）。这可能会对自然或人类有害。

根据美国疾病控制与预防中心:

参考翻译：

Bioterrorism is terrorism involving the intentional release or dissemination of biological agents. These agents are bacteria, viruses, or toxins, and may be in a naturally occurring or a human-modified form. For the use of this method in warfare, see biological warfare.