縦方向のDictionary of Linguistics (Francis Bond) ; 鉛直のRiver and Water Resources Glossary (Infrastructure Development Institute Japan) ; 垂直的(すいちょくてき)Life Science Dictionary (Shuji Kaneko) ; 垂直方向Life Science Dictionary (Shuji Kaneko) ; 垂直線(すいちょくせん)River and Water Resources Glossary (Infrastructure Development Institute Japan)