火か災さい積せき雲うん

noun

pyrocumulus cloud; flammagenitus; fire cloud

Technical meteorological term for a cumulus cloud formed by a large fire or volcanic eruption. Used mainly in scientific or disaster-related contexts.

• 山やま火か事じの上じょう空くうに火か災さい積せき雲うんが発はっ生せいした。

  A pyrocumulus cloud formed above the wildfire.

• 火か災さい積せき雲うんは、大だい規き模ぼな火か災さいや火か山ざん噴ふん火かによって生しょうじる積せき雲うんの一いっ種しゅです。

  A pyrocumulus cloud is a type of cumulus cloud produced by a large fire or volcanic eruption.