(informal) Synonym of yuck factor

(mathematics) The decomposition of a composite number into a product of smaller integers

An antigen of the Rhesus system; understood unless otherwise specified to refer to Rhesus factor D (RhD), which appears on the surface of the red blood cells of most (85%) humans. An incompatibility between the Rh-blood types of a mother and her baby may cause serious disease for the baby.

(physics) The ratio of the RMS value to the absolute mean of a sinusoidal wave (especially to that of an alternating current)

plural of x-factor

(idiomatic) An unknown or hard-to-define influence; a factor with unknown or unforeseeable consequences. / (idiomatic) A special talent, ability or quality or its indefinable cause.

plural of form factor

(mathematics) The factorization of a positive integer into its constituent prime numbers

Alternative spelling of X factor

plural of X factor