Alternative spelling of X factor

(idiomatic, engineering) A quantity introduced to compensate for uncertainty. / (idiomatic) Any padding or compensation built into a guess or estimate.

(electrical, engineering) The ratio of the actual power to the apparent power in an alternating current power system; specifically, the cosine of the phase angle between the voltage and the current.

(engineering) The ratio of the maximum stress or load which something can withstand to the stress or load which it was designed to withstand under normal operation.

(biochemistry) Any of various substances that cause apoptosis in cells

The lure of another home, country, region, organization, or religion.

(science fiction) A hypothetical figure describing a speed of one light-year per hour.

(Britain) A trader in grains.

(economics) The phenomenon whereby many small purchases add up to a significant expenditure over time.

A factor that encourages one to leave one's current home, region, country, organization, or religion.