Classes starting with P
pacemaker
- Endogenous or self sustained oscillator.
passive
- See oscillator.
period-τ
- Time after which a defined phase of the oscillation re-occurs.
permissive
- (stimulus or condition) Necessary to allow the expression of a phasic or tonic phenomenon.
phase-angle
- Position of a parameter value relative to the period (also annotated with the Greek letter phi, expressed in fraction of the period or in time, if the length of period is known).
phase-angle-difference-ψ
- Difference in position between two phase-angles in two coupled oscillations (also annotated with the Greek letter psi).
phase-shift-ϕ
-
Displacement of an oscillation along the time axis (see advancing and delaying).
phase-ϕ
- Instantaneous state of an oscillation within a period (synonymous with reference point).
photoperiod
- Light time, mainly used in a seasonal context.
photophase
- Light time.
pulsatile
- (pattern) Alternation of high and low levels of the parameter studied without presuming a stability in period.