pedology (n.)youdaoicibaDictYouDict[pedology 词源字典]
"scientific study of the soil," 1924, from Greek pedon "ground, earth," from PIE root *ped- (1) "foot" (see foot (n.)) + -logy. Related: Pedological. Earlier it was a word for "the study of children" (1894), from pedo-.[pedology etymology, pedology origin, 英语词源]