Chemist
late Middle English (denoting an alchemist): from French chimiste, from modern Latin chimista, from alchimista ‘alchemist’, from alchimia (see alchemy).
wiktionary
First attested 1562, borrowed from French chimiste, from Medieval Latin chimista, from earlier alchimista(literally “ alchemist”), from Arabic الْكِيمِيَاء (al-kīmiyāʾ), from article al- + Ancient Greek χυμεία(khumeía, “art of alloying metals”), from χύμα(khúma, “fluid”), from χυμός(khumós, “juice”), from χέω(khéō, “I pour”).
etymonline
chemist (n.)
1560s, chymist, "alchemist," from French chimiste, from Medieval Latin chimista, reduced from alchimista (see alchemy). Modern spelling is from c. 1790. Meaning "chemical scientist, person versed in chemistry" is from 1620s; looser meaning "dealer in medicinal drugs" (mostly in British English) is from 1745.