substrate

American  

[suhb-streyt] / ˈsʌb streɪt /

noun

1. a substratum.

2. Biochemistry. the substance acted upon by an enzyme.

3. Electronics. a supporting material on which a circuit is formed or fabricated.

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substrate British  

/ ˈsʌbstreɪt /

noun

1. biochem the substance upon which an enzyme acts

2. another word for substratum

3. electronics the semiconductor base on which other material is deposited, esp in the construction of integrated circuits

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substrate Scientific  

/ sŭb′strāt′ /

1. The material or substance on which an enzyme acts.

2. See more at enzyme

3. The surface on or in which plants, algae, or certain animals, such as barnacles or clams, live or grow. A substrate may serve as a source of food for an organism or simply provide support.

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Etymology

Origin of substrate

First recorded in 1570–80; variant of substratum

Explanation

A substrate is the base layer of something, or a layer that's underneath another layer. It can also be a surface on which an organism grows or is attached. Substrate also has a linguistic meaning: It's an indigenous language that contributes words or parts of speech to the language of an invading people who have imposed their language on the indigenous people. Throughout the United States, for instance, there are towns with Native American names, because Native American languages form a substrate to American English.

Example Sentences

See Examples For:

substrate

"Instead of soil, we pack these containers with a specialized coco-peat substrate derived entirely from coconut husk. We then integrate a highly precise drip-irrigation and fogging system to control micro-climates."

From BBC ● Jul. 30, 2026

The FPO is also building vertical towers, where strawberries can be grown on a coco-peat substrate, five layers deep.

From BBC ● Jul. 30, 2026

Increasing indium-phosphide substrate production should go a long way to easing bottlenecks for optical devices, as JX Advanced Metals sells its entire output to third parties.

From The Wall Street Journal ● Jul. 9, 2026

Every writer, teacher and researcher who ever put words on a page has contributed, without compensation or consent, to the substrate upon which AI’s productive capacity was built.

From MarketWatch ● Jul. 6, 2026

Matter is the indefinite substrate, form gives it definiteness.

From A Critical History of Greek Philosophy by Stace, W. T. (Walter Terence)