deviation, divergence, departure, difference
Meaning: a variation that deviates from the standard or norm; "the deviation from the mean"
Meaning: the difference between an observed value and the expected value of a variable or function
"Do not blame him, however, for departing from his character, where the deviation is necessary.
I therefore take that to be the correct form and colour, and the darker colour to be an accidental deviation.
Briefly, this Man, Who, apparently, and in the eyes of all, was lowly, arose with such great power that He abolished a religion that had lasted fifteen hundred years, at a time when the slightest deviation from it exposed the offender to danger or to death.
If it were due to irregularities in the glass a second prism should rather increase them, but a second prism when held in appropriate position was able to neutralise the dispersion and to reproduce the simple round white spot without deviation. Evidently the spreading out of the beam was connected in some definite way with its refraction.