Wiktionary
n. A contrail; a visible line of condensation flowing from the edge of an airplane wing or similar structure.
WordNet
n. an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust [syn: contrail]
Usage examples of "condensation trail".
Far below, Powers could see the condensation trail of a single-engine jet moving fast in the opposite direction.
Illuminated by the moon, the condensation trail was bright enough to be seen for fifty miles across the clear, cold sky-bright enough to be spotted by a flight of two Republic of Turkey F- 16s on a late-night air intercept training mission in the Samsun Military Operating Area off the northern coast of Turkey over the Black Sea.