底てい盤ばん

noun

base slab; foundation slab

In construction, the thick concrete slab forming the bottom of a structure, such as a building's foundation or a bridge's footing.

• この建たて物ものの底てい盤ばんは厚あつさが2メートルある。

  The base slab of this building is two meters thick.

noun

batholith

In geology, a large mass of intrusive igneous rock that formed deep underground.

• この地ち域いきの花か崗こう岩がんは巨きょ大だいな底てい盤ばんの一いち部ぶだ。