pepper spray: a nonlethal aerosol spray made with the pepper derivative oleoresin capiscum; used to cause temporary blindness and incapacitate an attacker; also used as a bear deterrent
aerosol: a dispenser that holds a substance under pressure and that can release it as a fine spray (usually by means of a propellant gas)
specific heat: the heat required to raise the temperature of one gram of a substance one degree centigrade