altostratus

n.

1.

(Meteor.) A cloud formation similar to cirro-stratus, but heavier and at a lower level; a stratus cloud at an intermediate altitude of 2 or 3 miles.

Noun

1.

altostratus - a stratus cloud at an intermediate altitude of 2 or 3 miles Synonyms: altostratus cloud

altostratus cloud, stratus, stratus cloud