The process by which an organism produces others of its biological kind
The sexual activity of conceiving and bearing biological offspring
The process by which an organism produces others of its kind; breeding, propagation, procreation, reproduction.
The act of increasing or rising; augmentation, amplification, enlargement, escalation, aggrandizement.
The result of building up; buildup, accretion.
The spread of biochemical, nuclear and other weapons of mass destruction to countries not originally involved in developing them.