Multifactorial vs. Multifactoral: What's the Difference?

Involving, dependent on, or controlled by several factors.

Of, relating to, or caused by a pattern of familial inheritance resulting from multiple genetic or environmental factors or from a combination of both.

Involving, or controlled by multiple factors.

Involving multiple genetic and/or environmental factors

(maths) A generalisation of a factorial in which each element to be multiplied differs from the next by an integer (e.g. n(n-3)(n-6)(n-9)...)

Involving or depending on several factors or causes (especially pertaining to a condition or disease resulting from the interaction of many genes)