substrata

/sʌbˈstreɪtə/
noun
  1. Layers or surfaces that lie beneath something, especially in geology or biology; the underlying foundation or basis.
    • The geologist studied the different substrata of rock beneath the soil.
    • In linguistics, the substrata of older languages can still be seen in modern vocabulary.
    • The artist painted on a canvas with a special substrata to make the colors brighter.
Antonyms
What does "substrata" mean? | whatsthatwordmean | whatsthatwordmean