facient

Etymology
From, , present participle of.

Noun

 * 1)  One who does something; a doer; an agent.
 * 2)  One of the variables of a quantic as distinguished from a coefficient.
 * 3) A multiplier.
 * 1) A multiplier.

Usage notes
The terms facient, faciend, and factum may imply that the multiplication involved is not ordinary multiplication, but some specified operation or a placeholder for any mathematical operation.