production — the act of producing; creation; manufacture.
discharge — to relieve of a charge or load; unload: to discharge a ship.
emanation — An abstract but perceptible thing that issues or originates from a source.
secretion — (in a cell or gland) the act or process of separating, elaborating, and releasing a substance that fulfills some function within the organism or undergoes excretion.
radiation — Physics. the process in which energy is emitted as particles or waves. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body. the energy transferred by these processes.
diffusion — act of diffusing; state of being diffused.