Meaning of substratum

sub•stra•tum

Pronunciation: (sub'strā"tum, -strat"um, sub-strā'tum, -strat'um), [key]
— pl. -stra•ta stra•tums.
  1. something that is spread or laid under something else; a stratum or layer lying under another.
  2. something that underlies or serves as a basis or foundation.
  3. the subsoil.
  4. the base or material on which a nonmotile organism lives or grows.
  5. substance, considered as that which supports accidents or attributes.
  6. a layer of material placed directly on a film or plate as a foundation for the sensitive emulsion.
  7. a set of features of a language traceable to the influence of an earlier language that it has replaced, esp. among a subjugated population:quatre-vingts (“four twenties”), may reflect a Celtic substratum. Cf. The French word for 80,
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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