Noun
distrail (plural distrails)
A clear path through a cloud created by a passing aircraft, caused either by evaporation or freezing of water droplets in the wake.
A distrail forms when the heat of engine exhaust evaporates the liquid water droplets in a cloud, turning them back into invisible, gaseous water vapor. Source: Internet
This photograph of a distrail was taken on November 22, 2012 in Hong Kong Where an aircraft passes through a cloud, it can clear a path through it; this is known as a distrail (short for "dissipation trail"). Source: Internet