Anatomical term for the lips; used in medical or formal contexts. In everyday speech, 唇 (くちびる) is more common.
口唇の乾燥を防ぐためにリップクリームを塗る。
Apply lip balm to prevent dryness of the lips.
oral phase; oral stage
cheilitis; chapped lips
cleft lip
labial artery
oral character
Compound of 口 (mouth) and 唇 (lip), forming a formal anatomical term.