S / strātus
noun

strātus

gen. strātūs · gender masculine · decl. 4th
A spreading; strewing
A spreading, strewing, Varr. R. R. 1, 50, 3.—
a cover; spread; a horse-cloth by extension
Transf., for the usual stratum, a cover, spread: in stratu omnem stragulam vestem, Dig. 50, 16, 45; Favorin. ap. Gell. 15, 8, 2.—Of a horse-cloth, Sol. 45 med.