干かん潮ちょう線せんかんちょうせんMeanings1nounlow-water mark; low-tide lineRefers to the line on a shore marking the lowest point reached by the tide. Often used in geographical or nautical contexts.See also: 満潮線干かん潮ちょう線せんより下したの部ぶ分ぶんは、潮しおが引ひく
