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1560s, chymist, "alchemist," from Middle French chimiste, from Medieval Latin chimista, reduced from alchimista (see alchemy). Modern spelling is from c.1790. Meaning "chemical scientist" is from 1620s; meaning "dealer in medicinal drugs" (mostly in British English) is from 1745.
chemist chem·ist (kěm'ĭst)
A scientist specializing in chemistry.