Etymology

substratum

sub·stra·tum
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Today it means: A layer that lies underneath another. Full definition →

New Latin substrātum ← Latin substrātus
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The story

  1. Latin · derived fromsubstrātus
  2. New Latin · learned borrowing fromsubstrātum
  3. English todaysubstratum

Learned borrowing from New Latin substrātum, nominalisation of the neuter of Latin substrātus, perfect passive participle of substernō. By surface analysis, sub- + stratum.

Etymology from Wiktionary, CC BY-SA 4.0.