Lower lip - Kashin

Japanese: 下唇 - かしん

〘noun〙① The lower lip. ※Anatomy New Book (1774) 2 "The lower lip is in the upper part of _{the second} _nod ."② The lower part of the corolla of a plant of the Lamiaceae family. ③ The ligule that forms in the sporangium of a plant of the genus Caprifoliaceae. ④ Part of the mouthparts of arthropods. In insects, it is a fused second maxilla that has evolved from an appendage on the head, while in crustaceans it is not an appendage that has evolved, but rather it is opposed to the upper lip and forms the front and back walls of the mouth. [Vocabulary of Biology (1884)]

Shita-kuchibiru [lower lip]

〘 noun 〙 The lower lip. [Meigoki (1275)] ※Ukigumo (1887-89)〈Futabatei Shimei〉 2 "The lower lip protrudes in a funny way and the mouth is closed in a sulky manner."

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① 下のくちびる。※解体新書（1774）二「下唇者、在_二頷上_一」② シソ科植物の花冠の下方の部分。③ ミズニラ科ミズニラ属植物の胞子嚢(ほうしのう)にできる小舌。④ 節足動物の口器の一部。昆虫にあるものは、頭部の付属肢から変化した第二小顎が合一したもので、甲殻類のものは付属肢が変化したものではなく、上唇に対立して口の前後の壁をなすもの。〔生物学語彙（1884）〕