substratum

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Related to Substrate language: superstratum, Superstrate

sub·stra·tum

(sŭb-strā'tŭm),
Any layer or stratum lying beneath another.
[L. see substrate]

substratum

(sŭb′strā′təm, -străt′əm)
n. pl. sub·strata (-strā′tə, -străt′ə) or sub·stratums
Biology A substrate.

sub·stra′tive adj.

substrate

, substratum (sub'strat) (sub-stra'tum) [L. substratum, to lie under]
1. An underlying layer or foundation.
2. A base, as of a pigment.
3. The substance acted upon, as by an enzyme. See: enzyme
References in periodicals archive ?
I thus conclude that, intuitively appealing though Muysken's koineization hypothesis is, a strong case in its favor is yet to be made, and the extant descriptions of possible substrate languages does not allow one to be more confident here.
In addition, the relevant substrate languages, such as Shuar (Jivaroan), are suffixal in nature.