fuel-air explosive: a device consisting of a container of fuel and two explosive charges; the first charge bursts open the fuel container at a predetermined height and spreads the fuel in a cloud that mixes with atmospheric oxygen; the second charge detonates the cloud which creates an enormous blast wave and incinerates whatever is below
explosive device: device that bursts with sudden violence from internal energy
glottochronology: the determination of how long ago different languages evolved from a common source language