stratum

n. அடுக்குப் படுகை, (மண்.) நில அடுக்கு, படிநிலைப்பாளம், சமூகத்தரம், சமுதாயப் படிநிலை.

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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.) Defn: 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.

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