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.
山火事の上空に火災積雲が発生した。
A pyrocumulus cloud formed above the wildfire.
火災積雲は、大規模な火災や火山噴火によって生じる積雲の一種です。
A pyrocumulus cloud is a type of cumulus cloud produced by a large fire or volcanic eruption.
積雲 is a general cumulus cloud, while 火災積雲 specifically refers to a cumulus cloud formed by fire or volcanic heat.
Compound of 火災 (kasai, 'fire, conflagration') and 積雲 (sekiun, 'cumulus cloud'). The reading follows standard on'yomi.