noun

substrate

SUB-strayt

Substrate (noun) means the surface or material that something is built on, grown on, or attached to. Example: “Orchids grow on a bark substrate rather than in ordinary soil.”

noun

The surface or material that something is built on, grown on, or attached to.

"Orchids grow on a bark substrate rather than in ordinary soil."

"The circuit is printed onto a thin ceramic substrate."

technical In biochemistry, the molecule that an enzyme acts on and converts into a product.

"Each enzyme binds only the substrate that fits its active site."

"Lactose is the substrate for lactase."

In ecology, the material at the bottom of a habitat in which organisms live or on which they feed.

"The river bed's gravel substrate supports a rich insect population."

How to Use Substrate

Learner’s notes

In plain EnglishThe stuff underneath that something sits on, grows on or is made from.

When to use it

Technical but widely used across biology, chemistry, electronics and gardening.

Memory tip

The plural is substrates; substrata is the plural of substratum.

Trace the full origin ↓

Easily confused with

substratum subtrate (misspelling) substrata

Common pairings

enzyme substrate growing substrate silicon substrate substrate concentration

Study it as flashcards or scroll it in Flow — saved to your collection.

Test yourself on “substrate” A quick quiz — meaning, synonyms & usage →

Fill the Gap

Can you complete this real example?

Orchids grow on a bark _____ rather than in ordinary soil.

Etymology

From Latin substratum, the neuter past participle of substernere "to spread underneath", from sub- "under" and sternere "to spread".

Origin: Latin

Synonyms

View more →

base foundation underlayer medium support

Related Words

found bad support service post evidence hold base

Rhymes for substrate

ate date rate mate fate abate slate plate state grate create update

See all rhymes for substrate →

Frequently Asked Questions

What is the difference between a substrate and a substratum?

They come from the same Latin word and often mean the same thing. "Substrate" is the standard term in science and manufacturing; "substratum" is more common in geology, linguistics and general figurative use, as in an underlying layer of meaning.

What is a substrate in biology?

Two things, depending on context. In biochemistry it is the specific molecule an enzyme binds and changes. In ecology and microbiology it is the surface or nutrient material an organism lives on or feeds from, such as agar in a culture dish.

What is the difference between a substrate and a reactant?

Every substrate is a reactant, but the word substrate specifically names the reactant that an enzyme or catalyst acts on. Chemists say "reactant" generally and "substrate" when a catalyst is doing the work.

People Also Searched

found bad support service post evidence hold base