Bible Dictionaries
Substratum

Webster's Dictionary

(1):

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

(2):

(n.) That which is laid or spread under; that which underlies something, as a layer of earth lying under another; specifically (Agric.), the subsoil.

Bibliography Information
Webster, Noah. Entry for 'Substratum'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/substratum.html. 1828.