Stratus

strā′tus, n. the fall or night-cloud, the lowest of clouds, a widely-extended horizontal sheet, of varied thickne .— ns. Strā′to-cir′rus , better Cirro-stratus (see Cirrus ); Strā′to-cū′mulus , better Cumulo-stratus (see Cumulus ). [L. stratus , a coverlet— sternĕre , stratum , to spread.]