detritus (n.)youdaoicibaDictYouDict[detritus 词源字典]
1795, "process of erosion," from Latin detritus "a wearing away," from detri-, stem of detere "wear away" (see detriment). Geological sense of "matter produced by erosion" is 1802, probably from French detritus; incorrect, in any case.[detritus etymology, detritus origin, 英语词源]