vaportrail
nounUK /ˈveɪpətreɪl/
US /ˈveɪpərˌtreɪl/
A long white line of tiny water drops left in the sky by a flying airplane.
We watched the vaportrail fade slowly behind the plane.
OTHER MEANINGS
2. A visible trail of mist or vapor left behind by a fast-moving object.
The rocket left a bright vaportrail across the evening sky.
3. A faint trace or sign that something was there.
Investigators followed the vaportrail of evidence back to the source.
4. The lingering cloud from an electronic cigarette or similar device.
A thin vaportrail hung in the air near the window.