Beginning around 1720, a rigid distinction began to be drawn for the first time between "alchemy" and "chemistry".
bɪɡˈɪnɪŋ ɚɹˈaʊnd wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd twˈɛnti, ɐ ɹˈɪdʒɪd dɪstˈɪŋkʃən bɪɡˈæn təbi dɹˈɔːn fɚðə fˈɜːst tˈaɪm bᵻtwˈiːn "ˈælkəmi" ænd "kˈɛmɪstɹi".