stratum

Noun
  1. One of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) (synset 108674880)
    referred to in: being, organism - a living thing that has (or can develop) the ability to act or function independently
    is a type of: layer - a relatively thin sheetlike expanse or region lying over or under another
    subtypes:
    • cuticle, epidermis - the outer layer of the skin covering the exterior body surface of vertebrates
    • corneum, horny layer, stratum corneum - the outermost layer of the epidermis consisting of dead cells that slough off
    • stratum lucidum - the layer of epidermis immediately under the stratum corneum in the skin of the palms and soles
    • stratum granulosum - the layer of epidermis just under the stratum corneum or (on the palms and soles) just under the stratum lucidum; contains cells (with visible granules) that die and move to the surface
    • malpighian layer, rete malpighii, stratum basale, stratum germinativum - the innermost layer of the epidermis
    • corium, derma, dermis - the deep vascular inner layer of the skin
    • cambium - the inner layer of the periosteum
    • paries, wall - (anatomy) a layer (a lining or membrane) that encloses a structure
    • substrate, substratum - any stratum or layer lying underneath another
    • superstrate, superstratum - any stratum or layer superimposed on another
    • horizon - a specific layer or stratum of soil or subsoil in a vertical cross section of land
    • bed, seam - a stratum of ore or coal thick enough to be mined with profit
    • bed - (geology) a stratum of rock (especially sedimentary rock)
  2. People having the same social, economic, or educational status (synset 107990472)
    "the working class"; "an emerging professional class"
    is a type of: people - (plural) any group of human beings (men or women or children) collectively
    subtypes:
    • domain, world - people in general; especially a distinctive group of people with some shared interest
    • age class - people in the same age range
    • agriculture - the class of people engaged in growing food
    • brotherhood, fraternity, sodality - people engaged in a particular occupation
    • estate, estate of the realm, the three estates - a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights
    • labor, labour, proletariat, working class - a social class comprising those who do manual labor or work for wages
    • lower class, underclass - the social class lowest in the social hierarchy
    • bourgeoisie, middle class - the social class between the lower and upper classes
    • booboisie - class consisting of all those who are considered boobs
    • commonality, commonalty, commons - a class composed of persons lacking clerical or noble rank
    • peasantry - the class of peasants
    • demimonde - a class of woman not considered respectable because of indiscreet or promiscuous behavior
    • underworld - the criminal class
    • yeomanry - class of small freeholders who cultivated their own land
    • caste - a social class separated from others by distinctions of hereditary rank or profession or wealth
    • caste - (Hinduism) a hereditary social class among Hindus; stratified according to ritual purity
    • upper class, upper crust - the class occupying the highest position in the social hierarchy
    • ninja - a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations
    • firing line - the most advanced and responsible group in an activity
    • immigrant class - recent immigrants who are lumped together as a class by their low socioeconomic status in spite of different cultural backgrounds
    • center - politically moderate persons; centrists
    • old school - a class of people favoring traditional ideas
    • market - the customers for a particular product or service
    • craft, trade - people who perform a particular kind of skilled work
    • fair sex, woman, womanhood - women as a class
    belongs to: class structure - the organization of classes within a society
    is a part of: society - an extended social group having a distinctive cultural and economic organization
    same as: class, social class, socio-economic class
  3. An abstract place usually conceived as having depth (synset 106257026)
    "a good actor communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions on many strata simultaneously"
    is a type of: place - an abstract mental location
    same as: layer, level
  4. A subpopulation divided into a stratified sampling (synset 106036690)
    is a type of: subpopulation - a population that is part of a larger population

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