■ noun cloud forming a continuous uniform layer which resembles stratus but occurs at medium altitude (typically 2 to 7 km, 6,500 to 23,000 ft).
Origin
C19: from mod. L. alto- (from L. altus 'high') + stratus .
■ noun cloud forming a continuous uniform layer which resembles stratus but occurs at medium altitude (typically 2 to 7 km, 6,500 to 23,000 ft).
Origin
C19: from mod. L. alto- (from L. altus 'high') + stratus .
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004