mass ratio

reduction ratio / gear ratio

Voltage Standing Wave Ratio (VSWR) / voltage standing-wave ratio

virtual mass / additional mass

jam to signal ratio (J/S ratio)

Ad Hoc Steering Group on Weapons of Mass Destruction (NATO)

Alliance Policy Framework on Proliferation of Weapons of Mass Destruction

aspect ratio

center mass

center mass hold

critical mass

elimination of weapons of mass destruction

fighter-to-administrative personnel ratio

fissile mass

high expansion-ratio

levy in mass (Levée en masse)

mass

mass casualties

mass casualty management

mass decontamination equipment

power-to-weight ratio

proliferation of weapons of mass destruction

propellant mass

protection against weapons of mass destruction

signal-to-noise ratio (SNR; S/N)

supercritical mass / quantity

thrust-to-weight ratio

weapon(s) of mass destruction (WMD)

Weapons of Mass Destruction Centre (NATO)

WMD alarm (weapon of mass destruction)

mass graves

mass consciousness

mass grave site