deoxyadenosine monophosphate: one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
physical entity: an entity that has physical existence
vx gas: a highly lethal nerve agent used in chemical warfare; a toxic liquid that penetrates the skin or lungs to disrupt the nervous system and stop respiration; in combat VX gas is deployed by detonating a container over the target area and can persist in the environment up to several weeks after release