Index of English words, starting with "st"

(1) - Stratum (n.) A bed or layer artificially made; a course.
(2) - Stratum (n.) A bed of earth or rock of one kind, formed by natural causes, and consisting usually of a series of layers, which form a rock as it lies between beds of other kinds. Also used figuratively.

(1) - Stratus (n.) A form of clouds in which they are arranged in a horizontal band or layer. See Cloud.