substratum

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sub·stra·tum / ˈsəbˌstrātəm; -ˌstra-/ • n. (pl. -ta / -tə/ ) an underlying layer or substance, in particular, a layer of rock or soil beneath the surface of the ground. ∎  a foundation or basis of something: there is a broad substratum of truth in it.

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substratum XVII. — pp. of L. substernere; see SUB-, STRATUM.

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substratum See substrate.

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substratum See SUBSTRATE.

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substratum See SUBSTRATE.