a number of materials

USAGE SUMMARY

The phrase "a number of materials" is correct and usable in written English.
It can be used when referring to multiple items or types of materials in a general sense. Example: "The project requires a number of materials, including wood, metal, and fabric."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

43 human-written examples

Natural light is polarized in passage through a number of materials, the most common being polaroid.

Encyclopedia Britannica

For example, a number of materials that inhibit formation of gibberellins by the plant cause dwarfing.

Encyclopedia Britannica

In 1943, the Mint, hoping to preserve copper for military uses, experimented with a number of materials, including Bakelite, before settling on galvanized steel.

The New Yorker

A number of locations have been searched, a number of materials have been taken in and are being reviewed and analysed.

The Guardian

A number of materials known as rooting cofactors have been found that interact with auxin to further stimulate rooting, and these are sold as a hormone rooting compound.

Encyclopedia Britannica

Automated systems can sort a number of materials simultaneously, such as paper, cardboard, aluminum, plastic, and glass, using such tools as magnets and ultraviolet optical scanners.

Encyclopedia Britannica

Human-verified similar examples from authoritative sources

Similar Expressions

15 human-written examples

He added that the Justice Department document contained "a number of material misstatements and omissions, which we look forward to having the opportunity to correct in court".

The New York Times

News on a number of material bids is due in the first half, including the DWP work programme (up to £3bn per annum), MOD recruitment partnering project (£70m per annum), Royal Navy training (£60m) and a number of Justice bids.

The Guardian - Business

Each determinant consisted of a number of material particles called biophores, inherited from both parents.

SEP

We also find ourselves looking at a number of material stock.

Forbes

Combined SEM/EDX analyses reveal a number of material removal modes.

Wear

Expert writing Tips

Best practice

When using "a number of materials", ensure the context clarifies whether you are referring to a specific set or a general category of materials. This will help avoid ambiguity.

Common error

Avoid using "a number of materials" without providing context or examples. Instead, be specific about the types of materials you are referencing to improve clarity for the reader.

Linguistic Context

The phrase "a number of materials" functions as a determiner phrase followed by a plural noun. It indicates an unspecified quantity of multiple substances. Ludwig AI confirms its usage is grammatically correct.

Expression frequency: Very common

Frequent in

Science

54%

News & Media

23%

Encyclopedias

11%

Less common in

Wiki

7%

Formal & Business

3%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "a number of materials" is a common and grammatically correct way to refer to multiple substances, as confirmed by Ludwig. It is prevalent in scientific, news, and encyclopedia contexts, suggesting a neutral to formal register. For enhanced clarity, specify the materials whenever possible. Related phrases include "various materials" and "several materials". Ludwig's examples showcase the phrase's diverse applications, further solidifying its place in professional English writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

various materials

Replaces "a number of" with "various", indicating diversity among the materials.

several materials

Substitutes "a number of" with "several", suggesting a limited but unspecified quantity.

multiple materials

Emphasizes that there are more than one material involved.

many different materials

Highlights both the quantity and the variety of materials.

a variety of materials

Focuses on the diverse nature of the materials used.

a range of materials

Implies a spectrum of materials, highlighting the scope of selection.

numerous materials

Suggests a high count of materials being considered.

a selection of materials

Indicates that the materials were chosen from a larger group.

certain materials

Points to particular, specified materials.

some materials

Indicates an unspecified quantity of materials.

FAQs

How can I use "a number of materials" in a sentence?

"A number of materials" is used to indicate multiple substances. For example: "A number of materials were tested for their resistance to corrosion".

What phrases are similar to "a number of materials"?

Similar phrases include "various materials", "several materials", or "multiple materials". The best choice depends on the context.

Is it better to say "a number of materials" or list the materials?

If you know all of the materials involved, listing them is more precise. Use "a number of materials" when you don't need to be exhaustive or are referring to a general category.

What's the difference between "a number of materials" and "the number of materials"?

"A number of materials" refers to multiple items. "The number of materials" refers to a specific quantity. For example: "A number of materials are recyclable. The number of materials in the experiment was ten".