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stratum

stra·tum

stratum

 
 
pronunciation:
streI tm [or] strae tm
part of speech: noun
inflections: strata, stratums
definition 1: a horizontal layer, esp. one of several parallel layers in a pile.
similar words:
layer
definition 2: a layer of material of similar composition, depth, temperature, or the like, as in a geological formation or the earth's atmosphere.
definition 3: a level in a social hierarchy.
Those belonging to the lowest stratum of society were most likely to be convicted of crimes they were innocent of.
derivation: stratous (adj.)