empirical (adj.)youdaoicibaDictYouDict[empirical 词源字典]
1560s, originally in medicine, "pertaining to or derived from experience or experiments," from empiric + -al (1). In a general sense of "guided by mere experience" from 1757. Related: Empirically (1640s as "by means of observation and experiment").[empirical etymology, empirical origin, 英语词源]