English Dictionary

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stratum

WIKTIONARY

stratum

Noun

∙ One of several parallel horizontal layers of material arranged one on top of another.
∙ A layer of sedimentary rock having approximately the same composition throughout. geology
∙ Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
∙ A layer of tissue. biology
∙ A class of society composed of people with similar social, cultural, or economic status.
∙ A layer of vegetation, usually of similar height. ecology

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