substratum

American  

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

noun

plural

substrata, substratums

1. something that is spread or laid under something else; a stratum or layer lying under another.

2. something that underlies or serves as a basis or foundation.

3. Agriculture. the subsoil.

4. Biology. the base or material on which a nonmotile organism lives or grows.

5. Philosophy. substance, considered as that which supports accidents or attributes.

6. Photography. a layer of material placed directly on a film or plate as a foundation for the sensitive emulsion.

7. Historical Linguistics. a set of features of a language traceable to the influence of an earlier language that it has replaced, especially among a subjugated population.

   The French word for 80, quatre-vingts (“four twenties”), may reflect a Celtic substratum.

---

substratum British  

/ sʌbˈstrɑːtəm, -ˈstreɪ- /

noun

1. any layer or stratum lying underneath another

2. a basis or foundation; groundwork

3. the nonliving material on which an animal or plant grows or lives

4. geology

   1. the solid rock underlying soils, gravels, etc; bedrock

   2. the surface to which a fixed organism is attached

5. sociol any of several subdivisions or grades within a stratum

6. Sometimes shortened to: sub.  photog a binding layer by which an emulsion is made to adhere to a glass or film base

7. philosophy substance considered as that in which attributes and accidents inhere

8. linguistics the language of an indigenous population when replaced by the language of a conquering or colonizing population, esp as it influences the form of the dominant language or of any mixed languages arising from their contact Compare superstratum

---

substratum Scientific  

/ sŭb′strā′təm,-străt′əm /

plural

substrata

1. An underlying layer or stratum.

2. A surface on which an organism grows or is attached; a substrate.

---

Other Word Forms

• substratal adjective
• substrative adjective

Etymology

Origin of substratum

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

Example Sentences

The message and the relentless pursuit of perfection it implored served as the substratum of Eric Musselman’s life.

From Seattle Times • Mar. 22, 2023

In a Morlockian twist, the creatures are not extraterrestrials, but intra: Their mole car has drilled up to the surface from their hive deep in the Earth’s substratum.

From Slate • Oct. 28, 2016

“What saves them from being mere inflated TV dramas is a substratum of complex overtones and compassions,” Jerry Tallmer wrote in The New York Post.

From New York Times • Sep. 13, 2015

The larva settles on a suitable substratum and develops into a sessile polyp.

From Textbooks • Jan. 1, 2015

There was no kindness, no gentleness to this departure; nothing human, but rather a degeneration into some demonic substratum of the body that had waited to lay waste to all the lineaments of grace.

From "The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume I: The Pox Party" by M.T. Anderson