cloudtop

Noun

1. The topmost layer of cloud.
   • The rains are only from October to December, and very rarely does the summer cloudtop rise to our level and sweep cool fringes over us, never depositing visible moisture anywhere. - 1932, Robert LeMoyne Barrett,...
   • A third ring system was added in March 1979 when Voyager-1 flew past Jupiter and imaged the outer edge of a faint, tenuous ring, 57,000 km above the planet's cloudtops. - 2014, John Westfall, William Sheehan, Celestial...