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contrails - 2 dictionary results

con⋅trail

[kon-treyl]
–noun
a visible condensation of water droplets or ice crystals from the atmosphere, occurring in the wake of an aircraft, rocket, or missile under certain conditions.
con·trail   (kŏn'trāl')   
n.  A visible trail of streaks of condensed water vapor or ice crystals sometimes forming in the wake of an aircraft. Also called vapor trail.

[con(densation) + trail.]
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