Akademik

substratum

Any layer or stratum lying beneath another. [L. see substrate]

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sub·stra·tum 'səb-.strāt-əm, -.strat-, 'səb-' n, pl -stra·ta -ə

1) the material of which something is made and from which it derives its special qualities

2) SUBSTRATE (2)

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sub·stra·tum (səb-straґtəm) [L.] 1. a substrate. 2. a lower layer or stratum.

Medical dictionary. 2011.