4 (Physics) a particular stage in a periodic process or phenomenon. 5 â¦ in phase (of two waveforms) reaching corresponding phases at the same time. 6 â¦ out of phase (of two waveforms) not in phase. 7 (Chem) a distinct state of matter characterized by homogeneous composition and properties and the possession of a clearly defined boundary.
1 Close contact with strep: the child lives in a home where a sibling, parent or other household member has a throat culture or rapid-strep test that is positive for strep throat. 2  Usually the contact is within the previous 7 days (reason: incubation period for strep is 2 to 5 days).ymptom Definition. 1  Close contact with strep: the child lives in a home where a sibling, parent or other household member has a throat culture or rapid-strep test that is positive for strep throat. 2  Usually the contact is within the previous 7 days (reason: incubation period for strep is 2 to 5 days).
The incubation period is seven to 21 (usually 10 to 21) days after exposure to the herpes varicella-zoster virus to the development of the symptoms.