S: (n) incubation ((pathology) the phase in the development of an infection between the time a pathogen enters the body and the time the first symptoms appear)
S: (n) brooding, incubation (sitting on eggs so as to hatch them by the warmth of the body)
S: (n) process, physical process (a sustained phenomenon or one marked by gradual changes through a series of states) "events now in process"; "the process of calcification begins later for boys than for girls"