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1. (n.) substratum
something that is spread or laid under something else; a stratum or layer lying under another.
2. substratum
something that underlies or serves as a basis or foundation.
3. substratum
the subsoil.
Etymology: (1625–35; < NL; see sub -, stratum)
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| Definition of 'substratum' |
Princeton's WordNet |
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1. (noun) substrate, substratum
a surface on which an organism grows or is attached
"the gardener talked about the proper substrate for acid-loving plants"
2. (noun) substrate, substratum
any stratum or layer lying underneath another
3. (noun) substrate, substratum
an indigenous language that contributes features to the language of an invading people who impose their language on the indigenous population
"the Celtic languages of Britain are a substrate for English"
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| Definition of 'substratum' |
Webster Dictionary |
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1. (noun) substratum
that which is laid or spread under; that which underlies something, as a layer of earth lying under another; specifically (Agric.), the subsoil
2. (noun) substratum
the permanent subject of qualities or cause of phenomena; substance
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Definitions of substratum 
