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[suhb-streyt] /ˈsʌb streɪt/
a substratum.
Biochemistry. the substance acted upon by an enzyme.
Electronics. a supporting material on which a circuit is formed or fabricated.
Origin of substrate
1570-80; variant of substratum Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for substrate


(biochem) the substance upon which an enzyme acts
another word for substratum
(electronics) the semiconductor base on which other material is deposited, esp in the construction of integrated circuits
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
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Word Origin and History for substrate

1810, from Modern Latin substratum (see substratum).

Online Etymology Dictionary, © 2010 Douglas Harper
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substrate in Medicine

substrate sub·strate (sŭb'strāt')

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

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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substrate in Science
  1. The material or substance on which an enzyme acts. See more at enzyme.

  2. 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.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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substrate in Technology

The body or base layer of an integrated circuit, onto which other layers are deposited to form the circuit. The substrate is usually Silicon, though Sapphire is used for certain applications, particularly military, where radiation resistance is important. The substrate is originally part of the wafer from which the die is cut. It is used as the electrical ground for the circuit.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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