n.
Pronunciation: ˌ al-t ō - ' str ā -t ə s, - ' stra-
Function: noun
Inflected Form: plural -ti \ - ˌ t ī \
Etymology: New Latin, from Latin altus + New Latin -o- + stratus
Date: 1894
: a fairly uniform mid-altitude layer of gray cloud darker than cirrostratus ― see CLOUD illustration