haplodontyoudaoicibaDictYouDict[haplodont 词源字典]
"Having the crowns of the molar teeth simple or single, and not divided into ridges, etc", Late 19th cent.; earliest use found in Proceedings of the Academy of Natural Sciences of Philadelphia. From haplo- + -odont.[haplodont etymology, haplodont origin, 英语词源]
lophodontyoudaoicibaDictYouDict
"(Of molar teeth) having transverse ridges on the grinding surfaces, characteristic of some ungulates", Late 19th century: from lopho- 'crest' + Greek odous, odont- 'tooth'.