Meaning of the word substratum in English

What does substratum mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

substratum

US /səbˈstræt̬.əm/
UK /səbˈstrɑː.təm/

Noun

1.

an underlying layer or substance

Example:
The archaeological dig revealed a clay substratum beneath the ancient city.
The plant requires a specific soil substratum to thrive.
2.

a language that influences another language, especially one that has been replaced by it

Example:
Latin acted as a substratum for many Romance languages.
The Celtic language is considered a substratum in the development of English.