Stratum

Noun

 * 1) One of several parallel horizontal layers of material arranged one on top of another.
 * 2)  A layer of sedimentary rock having approximately the same composition throughout.
 * 3) Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
 * 4)  A layer of tissue.
 * 5) A class of society composed of people with similar social, cultural, or economic status.
 * 6)  A layer of vegetation, usually of similar height.

Synonyms

 * tier

Related terms

 * stratification
 * stratify
 * stratosphere

Thesaurus
Appleton layer, F layer, Heaviside-Kennelly layer, Van Allen belt, band, bed, bedding, belt, blood, bracket, branch, caste, category, chemosphere, clan, class, couche, course, deck, division, estate, floor, gallery, grade, group, grouping, head, heading, ionosphere, isothermal region, kin, label, layer, ledge, level, lower atmosphere, measures, order, outer atmosphere, overlayer, overstory, photosphere, pigeonhole, plane, position, predicament, race, rank, rating, rubric, seam, section, sept, set, shelf, stage, standing, station, status, step, story, strain, stratification, stratosphere, subdivision, subgroup, suborder, substratosphere, substratum, superstratum, table, thickness, tier, title, topsoil, tropopause, troposphere, underlayer, understory, understratum, upper atmosphere, vein, zone

Etymology
From stratum:, neuter of stratus:, past participle of sternere:

Translations

 * Finnish:
 * French:


 * Japanese:
 * Russian:


 * Catalan:
 * Finnish: maakerros, kerrostuma
 * French:


 * Japanese:
 * Russian:


 * French:
 * Japanese:


 * Russian:


 * Catalan:
 * Finnish: ihokerros
 * French: ,


 * Japanese:
 * Russian:


 * Catalan:
 * Finnish: yhteiskuntaluokka, kansankerros
 * French: ,


 * Japanese:
 * Russian:


 * Catalan:

Noun

 * 1) bed, couch
 * 2) coverlet
 * 3) horse blanket

Etymology
Neuter of stratus:.

Descendants

 * English:
 * Italian:
 * Portuguese:
 * Romanian:
 * Spanish: