emitting
v.v. sending out something like light, heat, sound, or gas into the air. You use this when a machine or a natural object releases energy or particles.
v. producing and discharging something, especially gas, radiation, or light. Present participle of 'emit'; describes the active release of substances or energy from a source.
The old factory is emitting thick black smoke.
The sensor detected the device was emitting a low-frequency signal that interfered with the local radio station.
By emitting a specific sequence of light pulses, the deep-sea creature can communicate with potential mates while simultaneously deterring predators in the darkness.
Transitive — requires a direct object representing the substance or energy being released.