Emily Dickinson Lexicon

PHI-LOS'O-PHER, n. [See Philosophy.]

1. A person versed in philosophy, or in the principles of nature and morality; one who devotes himself to the study of physics, or moral or intellectual science.
2. In a general sense, one who is profoundly versed in any science. Philosopher's stone, a stone or preparation which the alchimists formerly sought, as the instrument of converting the baser metals into pure gold.