cultriformyoudaoicibaDictYouDict[cultriform 词源字典]
"Shaped like a knife or ploughshare; = cultrate", Late 18th cent.; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From post-classical Latin cultriformis from classical Latin cultr-, culter knife + -formis.[cultriform etymology, cultriform origin, 英语词源]