Substratum meaning

sŭbstrātəm, -strătəm
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A foundation or groundwork.
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The material on which another material is coated or fabricated.
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The characterless substance that supports attributes of reality.
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A substrate.
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A substrate.
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The base or material to which a plant is attached and from which it gets nutriment.
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A thin layer of material on a photographic film or plate serving as a base for the sensitive emulsion.
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The ground or other solid material on which an animal moves or is fastened.
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A substrate.
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An underlying layer or stratum.
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A surface on which an organism grows or is attached; a substrate.
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A layer that lies underneath another.
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(figuratively) The underlying cause or basis of something.
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(linguistics) A substrate.
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Substratum is the underlying layer, especially of rock or soil below the ground.

When you start to dig for a patio and you hit a layer of hard rock just below the ground, this layer of rock is an example of a substratum.

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Origin of substratum

  • New Latin substrātum from neuter of Latin substrātus past participle of substernere to lay under sub- sub- sternere to stretch, spread ster-2 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • sub- +"Ž stratum, both elements from Latin.

    From Wiktionary