Definitions for "Phase Delay"
Keywords:  ahead, delay, shift, sleep, clock
Phase delay is exactly the opposite of phase advance, i.e., a shift later in time. (Confusion is sometimes introduced into these concepts because clock language is reversed; to effect a phase delay, the clock is moved ahead or advanced. Contrariwise, as in the example in phase advance, the change from the 11 p.m. - 7 a.m. to the 8 p.m. - 4 a.m. position requires a movement of the clock backward.) See Phase advance.
a shift later in time, for instance if one's sleep cycle moves ahead on the clock
lengthening the sleep-wake cycle, as occurs when traveling from east to west. (200)
Keywords:  lag, pre, falls, filtered, behind
The time lag that a filter falls behind the pre-filtered data.