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Longman Dictionary of Contemporary English
substratum
noun
EXAMPLES FROM OTHER ENTRIES
▪ His books have tapped into a deep substratum of human religiosity.
EXAMPLES FROM CORPUS
▪ A particular branch, the Grammatical Shastra, was formulated using the Sanskrit vocabulary as a substratum, with no ambiguity whatsoever.
▪ Cultivation: An extremely undemanding plant as to its growing medium, and will grow almost in any substratum.
▪ Cultivation: Very undemanding as to its growing medium, it will grow well on any substratum.
▪ Research in other cell lines has suggested that the mechanical properties of the substratum are important in the maintenance of cellular differentiation.
▪ The substratum of this experience is the mastery of a technique.
▪ The distinction between substratum and entity also enables us to further specify the relations between Zeus and the world.
▪ They are suitable aquarium plants and are cultivated like Cryptocoryne species in a medium-rich substratum and water that is not too acid.
▪ Unlike the two previous species, this one prefers more organic content in its substratum.
The Collaborative International Dictionary
Substratum

Substratum \Sub*stra"tum\, n.; pl. Substrata. [L. substratus, p. p. 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 earth lying under another; specifically (Agric.), the subsoil.

  2. (Metaph.) The permanent subject of qualities or cause of phenomena; substance.

Douglas Harper's Etymology Dictionary
substratum

1630s, from Modern Latin substratum (plural substrata), noun use of neuter singular past participle of Latin substernere "to spread underneath," from sub- (see sub-) + sternere (see stratum).

Wiktionary
substratum

n. 1 A layer that lies underneath another. 2 (context figuratively English) The underlying cause or basis of something. 3 (context linguistics English) A substrate.

WordNet
substratum
  1. n. any stratum lying underneath another [syn: substrate]

  2. [also: substrasta (pl)]

Usage examples of "substratum".

Potentiality may be thought of as a Substratum to states and shapes--and forms which are to be received, which it welcomes by its nature and even strives for--sometimes in gain but sometimes, also, to loss, to the annulling of some distinctive manner of Being already actually achieved.

Above all, let us strive to disengage ourselves from homogeneous space, this substratum of fixity, this arbitrary scheme of measurement and division, which, to our greater advantage, subtends the natural, qualitative, and undivided extension of images.

Her bright head was covered with one of those patulous splashes of black lace that serve as a substratum for a garland of flowers.

A filamentous protonema is first developed, some of the branches of which are exposed to the light and contain abundant chlorophyll, while others penetrate the substratum as brown or colourless rhizoids.

The acknowledgment of this necessity, however, must not prevent us from recognizing the fact that, as a result of this restriction, modern scientific research, which has penetrated far into the dynamic substrata of nature, finds itself in the peculiar situation that it is not at all guided by its own concepts, but by the very forces it tries to detect.

With hardly an exception the liverworts are dorsiventral, and usually one side is turned to the substratum and the other exposed to the light.

The slabs of Flatirons now rising above me would exist only as a layer of soft substrata.

The acknowledgment of this necessity, however, must not prevent us from recognizing the fact that, as a result of this restriction, modern scientific research, which has penetrated far into the dynamic substrata of nature, finds itself in the peculiar situation that it is not at all guided by its own concepts, but by the very forces it tries to detect.

Once in the prelude it appears in three different forms simultaneously, and in an augmented shape it forms the substratum of the prelude, while other themes are cunningly woven above it.

The Open Conspiracy proposes to end and shows how an end may be put to that huge substratum of underdeveloped, undereducated, subjugated, exploited, and frustrated lives upon which such civilization as the world has known hitherto has rested, and upon which most of our social systems still rest.

You know how alike the asymmetric crystalline structures of a chromosome are to those of the DNA molecule, one of the constituents of the cerebrosides which constitute the substratum of the memory-processes?

Upon the general substratum rested a massive conglomerate, the crystallizations of which rose like a forest of gigantic pyramids and obelisks.

All the manifoldness of things consist only of so many modes of limiting the concept of the highest reality that forms their common substratum, in the same way as all figures are only different modes of limiting endless space.

In order to declare a thing to be a substance in phenomenal appearance, predicates of its intuition must first be given to me, in which I may distinguish the permanent from the changeable, and the substratum (the thing in itself) from that which is merely inherent in it.

Their attention is withdrawn totally into their own mind and there, in its formative substratum, they come face to face with the mental record of their life's journey, as faithfully and unemotionally recorded as in any scientific instrument.