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

Pober argues that the possibility of multiple conscious substrates does not mean every substrate can support consciousness.

From Science Daily • Jun. 24, 2026

Such ultrathin materials must be grown on a supporting foundation called a substrate, which acts as a template during fabrication.

From Science Daily • Jun. 17, 2026

Even the neuroscientist Anil Seth, one of the most prominent skeptical voices on AI consciousness, concedes there is “no knockdown argument” that consciousness requires a biological substrate.

From The Wall Street Journal • Jun. 10, 2026

Of the recently developed Pecorino-like cheese, the lab used a Neurospora mould, but would not say what waste was used as a substrate.

From BBC • Jun. 4, 2026

A steer, stepping on a box turtle, could inflict superficial damage to the shell or cause broken limbs but would probably not crush the turtle unless on a hard substrate.

From Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz by Legler, John M.