直ちょく円えん柱ちゅうちょくえんちゅうMeanings1nounright cylinderA cylinder whose axis is perpendicular to its bases. Used in geometry.直ちょく円えん柱ちゅうの体たい積せきは底てい面めん積せき×高かけるたかさで求もとめられる。The volume of a right cylinder is found by multiplying the base area by the height.
