底面 ていめん Meanings Noun bottom; underside; base base (of a polyhedron) Kanji 底 bottom. Read as テイ. 面 face. Read as メン. Example sentences まん丸に見えるあのお月さまはね、実は円錐の底面なんだよ。The moon looks so perfectly round. It's actually the base of a cone, you know. Jinuma: Japanese Dictionary · Word lists