1. 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 vapour in the engine exhaust
   - contrail, condensation trail, vapor trail [US]

Derived forms: vapour trails

Type of: cloud

Encyclopedia: Vapour trail

• boat whistle
• boat-billed heron
• boat-race
• boat-shaped
• boatbill
• boatbuilder
• boater
• boathouse
• boating
• boatload
• boatman
• boatmanship
• boatswain
• boatswain bird
• boatswain's chair
• boatyard
• bob
• bob about
• bob around
• Bob Dylan
• Bob Hope
• Bob Marley
• Bob Mathias
• bob under
• bob up