0 one of the parts or layers into which something is separated: --
The cliffs are characterized by remarkable zigzagging strata of shale and sandstone.
The report shows that drugs have penetrated every stratum of American society.
A strong partitioning of the strata is obvious: c. 25% of the species are restricted to each of the three strata.
Multiple levels of strata both inform and inhibit the film composer.
If extreme drying and cracking occurs, upper (usually darker) sediments drop into lower strata, resulting in a gross over turning of stratigraphy over time.
In terms of occupied space, they may literally monopolise the upper sediment strata at lower tidal levels (personal observation).
The 'crunch' issue for most strata, of course, is income security.
Let fj be the union of the highest strata down to the jth one.
Within each such region, it was then subdivided into rural-urban strata (>50 000 inhabitants).
Moreover, the evolution of the living standards of the lower strata of the population is in sharp contrast with that of the upper classes.
