ben·e·fi·cial /ˌbe-nə-'fi-shəl/ adj
1: providing benefits or advantages
2: receiving or entitling one to receive an advantage, benefit, or use
a beneficial shareholder
a beneficial estate
ben·e·fi·cial·ly /-shə-lē/ adv
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.