Definition of substrate in English:


Line breaks: sub|strate
Pronunciation: /ˈsʌbstreɪt


  • 1An underlying substance or layer.
    More example sentences
    • Where volcanic material has been extruded on to a soft substrate, the rate of erosion of the substrate can exceed that of the lava flow.
    • Also, special designs of roadbed through wetlands in permafrost terrain are required to protect the thermal regime in the underlying substrates.
    • Cameron found Vermiforichnus clarkei in many substrates from Ordovician to Holocene ages.
  • 1.1The surface or material on or from which an organism lives, grows, or obtains its nourishment: brachiopods attached to the substrate by a stalk
    More example sentences
    • The premature growth arrest of breast and skin epithelial cells grown on plastic substrates may be due to an inadequate culture environment.
    • In the first type, plants grow on a soil substrate that has a relatively high chance of being covered with leaf litter.
    • A lichen may absorb certain mineral nutrients from any of these substrates on which it grows, but is generally self-reliant in feeding itself through photosynthesis in the algal cells.
  • 1.2The substance on which an enzyme acts.
    More example sentences
    • Another approach would be to increase the cellular level of enzyme substrates such as ascorbic acid (vitamin C).
    • Enzymes that act on substrates such as polypeptides, nucleic acids, oligosaccharides, or lipid membranes often interact with more than one substrate molecule.
    • Type O is a nonfunctional allele, because it does not recognize the enzyme substrate.
  • 1.3A material which provides the surface on which something is deposited or inscribed, for example the silicon wafer used to manufacture integrated circuits: optical disk substrates
    More example sentences
    • Only on very smooth substrates like polished silicon wafers, can the thickness of deposited wax layers be measured exactly.
    • A trench is etched in a surface of the integrated circuit substrate such that a tip is formed.
    • A liquid-crystal panel comprises a pair of transparent glass substrates each being provided with an electrode.


early 19th century: anglicized form of substratum.

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