Beneficial

1. a. King.
2. a. Conferring benefits; useful; profitable; helpful; advantageous; serviceable; contributing to a valuable end; — followed by to.
3. a. Receiving, or entitled to have or receive, advantage, use, or benefit; as, the beneficial owner of an estate.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.