STRATAS
STRATA
Stra"ta, n.,
Definition: pl. of Stratum.
STRATUM
Stra"tum, n.; pl. E. Stratums, L. Strata. The latter is more common.
Etym: [L., from sternere, stratum, to spread; akin to Gr. Strew, and
cf. Consternation, Estrade, Prostrate, Stratus, Street.]
1. (Geol.)
Definition: 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.
2. A bed or layer artificially made; a course.
Source: Webster’s Unabridged Dictionary 1913 Edition