飛行機雲(ひこうきぐも) ひこうきぐも noun contrail; vapor trail weather 1. contrail; vapor trail (left by an aircraft) The white trail of condensed water vapor that forms behind a high-flying aircraft. Literally 飛行機(ひこうき) (airplane) + 雲(くも) (cloud). 空(そら)に飛行機雲(ひこうきぐも)が見(み)えた。🔊 I saw a contrail in the sky. 青空(あおぞら)に白(しろ)い飛行機雲(ひこうきぐも)が伸(の)びていく。🔊 A white contrail stretches across the blue sky. 二(ふた)つの飛行機雲(ひこうきぐも)が交差(こうさ)して、空(そら)に大(おお)きなバツ印(じるし)を描(えが)いた。🔊 Two contrails crossed, drawing a big X in the sky. Compound of 飛行機(ひこうき) (airplane) + 雲(くも) (cloud), with rendaku changing くも to ぐも. Refers to the white vapor trail behind a jet.Common collocations飛行機雲(ひこうきぐも)ができる: a contrail forms飛行機雲(ひこうきぐも)が伸(の)びる: a contrail stretches out飛行機雲(ひこうきぐも)が消(き)える: a contrail fades away general Added 2026.5.26 11:06 · Revised 2026.9.2 13:02 28000/28117_hikoukigumo