substratum

[ suhb-strey-tuhm, -strat-uhm, suhb-strey-tuhm, -strat-uhm ]
/ ˈsʌbˌstreɪ təm, -ˌstræt əm, sʌbˈstreɪ təm, -ˈstræt əm /

noun, plural sub·stra·ta [suhb-strey-tuh, -strat-uh, -suhb-strey-tuh, -strat-uh], /ˈsʌbˌstreɪ tə, -ˌstræt ə, -sʌbˈstreɪ tə, -ˈstræt ə/, sub·stra·tums.

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Compare superstratum.

Origin of substratum

From New Latin, dating back to 1625–35; see origin at sub-, stratum

OTHER WORDS FROM substratum

sub·stra·tive, sub·stra·tal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for substratum

British Dictionary definitions for substratum

substratum
/ (sʌbˈstrɑːtəm, -ˈstreɪ-) /

noun plural -strata (-ˈstrɑːtə, -ˈstreɪtə)

Derived forms of substratum

substrative or substratal, adjective

Word Origin for substratum

C17: from New Latin, from Latin substrātus strewn beneath, from substernere to spread under, from sub- + sternere to spread
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for substratum

substratum
[ sŭbstrā′təm, -străt′əm ]

Plural substrata substratums

An underlying layer or stratum.
A surface on which an organism grows or is attached; a substrate.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.