火か山ざん弾だん

noun

volcanic bomb

A geological term for a mass of molten rock ejected during an eruption that solidifies in flight, often taking on a streamlined shape.

• 火か山ざん弾だんは噴ふん火かの勢いきおいで遠とおくまで飛とばされることがある。

  Volcanic bombs can be thrown far by the force of an eruption.