| bacteriological warfare | <microbiology> Use of harmful bacteria by the military as weapons against the enemy. (09 Oct 1997) |
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| bacteriological | <microbiology> Pertaining to bacteriology. (18 Nov 1997) |
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| biological warfare | <microbiology> The military use of harmful biological agents such as pathogenic bacteria. (21 Mar 1998) |
| chemical warfare | Tactical warfare using incendiary mixtures, smokes, or irritant, burning, or asphyxiating gases. (12 Dec 1998) |
| chemical warfare agents | Chemicals that are used to cause the disturbance, disease, or death of humans during war. (12 Dec 1998) |
| psychological warfare | The manipulation of psychological influences, primarily concerned with morale, to strengthen the ability of one's own country and weaken the enemy. (12 Dec 1998) |
| nuclear warfare | Warfare involving the use of nuclear weapons. (12 Dec 1998) |