STRATUS

stratus, stratus cloud

(noun) a large dark low cloud

Source: WordNet® 3.1

Etymology

Noun

stratus (usually uncountable, plural strati)

(meteorology) A principal, low-level cloud type in the form of a gray layer with a rather uniform base, usually not associated with precipitation, and capable of producing corona phenomena and a weak, uniform luminance; abbreviated St.

Source: Wiktionary

Stra"tus, n. Etym: [L. stratus a spreading out, scattering, from sternere, stratum, to spread.] (Meteor.)

Definition: A form of clouds in which they are arranged in a horizontal band or layer. See Cloud.

Source: Webster’s Unabridged Dictionary 1913 Edition