lethal means

SUICIDOLOGY

Definition A psychiatric term of art referring to the implements* or actions** capable of causing death in a person with suicidal ideation. 

*E.g., firearms, pills that can cause death by over dose **Jumping off a suicide landmark, falling in front of a speeding vehicle

References lifegard.tripod.com/index-2.html

http://www.hsph.harvard.edu/means-matter/means-matter/saves-lives/