
1) Base 2) Interiority 3) Layer 4) Substantiality 5) Support 6) Underlayer
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https://www.crosswordclues.com/clue/substratum

1) Low-down layer 2) Stratum 3) Substrate 4) The subsoil
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https://www.crosswordclues.com/clue/substratum

• (n.) That which is laid or spread under; that which underlies something, as a layer of earth lying under another; specifically (Agric.), the subsoil. • (n.) The permanent subject of qualities or cause of phenomena; substance.
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http://thinkexist.com/dictionary/meaning/substratum/

The solid surface over which a cell moves or upon which a cell grows: should be used in this sense in preference to substrate, to avoid confusion. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

The solid surface over which a cell moves, or upon which a cell grows: should be used in this sense in preference to substrate, to avoid confusion.
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http://www.encyclo.co.uk/visitor-contributions.php
Sub·stra'tum noun ;
plural Substrata . [ Latin
substratus , past participle of
substernere to strew under;
sub under +
sternere to strew. See
Stratum .]
1. That which is laid or spread under; that which underlies something, as a layer of eart...
Found on
http://www.encyclo.co.uk/webster/S/228

Type: Term Pronunciation: sŭb-strā′tŭm Definitions: 1. Any layer or stratum lying beneath another.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=86115

[
n] - any stratum lying underneath another
Found on
http://www.webdictionary.co.uk/definition.php?query=substratum

substratum, subsratal, substrative 1. An underlying base, layer, or element. 2. In agriculture, subsoil. 3. In geology, bedrock. 4. In biology, the non-living material or base on which an organism lives or grows.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2047/2

(Gr. hypokeimenon) That in which an attribute inheres, or of which it is predicated; substance; subject. In Aristotle's philosophy hypokeimenon sometimes means matter as underlying form, sometimes the concrete thing as possessing attributes, sometimes the logicnl subject of predication. -- G.R.M.
Found on
https://www.encyclo.co.uk/local/21203

something that is spread or laid under something else; a stratum or layer lying under another. · something that underlies or serves as a basis or foundation. · the subsoil. · the base or material on which a nonmotile organism lives or grows. · substance, considered as that which supports accidents or attributes. · a laye...
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https://www.infoplease.com/dictionary/substratum
No exact match found.