皮ひ溝こう

noun

skin depression; epidermal depression

Anatomical term for a natural groove or furrow in the skin, such as the creases on joints or the lines of the palm.

• 手てのひらの皮ひ溝こうは人ひとによって異ことなる。

  The skin depressions on the palm differ from person to person.

• 関かん節せつ部ぶ分ぶんの皮ひ溝こうに汚よごれがたまりやすい。

  Dirt tends to accumulate in the skin depressions around the joints.