term:

Loaned Servant

loaned servant n

1 : an employee of one employer who is temporarily under the control of another called also loaned employee
2 : a doctrine under which a loaned servant is considered an employee of the borrowing employer who is thus liable for negligence or workers' compensation

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.