understratum

[ uhn-der-strey-tuhm, -strat-uhm ]

noun

, plural un·der·stra·ta [uhn, -der-strey-t, uh, -strat-, uh], un·der·strat·ums.

1. a substratum.

Word History and Origins

Origin of understratum¹

First recorded in 1725–35; under- + stratum

Example Sentences

Understratum, un′dėr-strā-tum, n. a substratum:—pl.

From Project Gutenberg