are a class of

USAGE SUMMARY

The phrase "are a class of" is correct and usable in written English.
It can be used to categorize or define a group of items, concepts, or entities that share common characteristics. Example: "Mammals are a class of animals characterized by the presence of mammary glands."

✓ Grammatically correct

Science

News & Media

Wiki

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

Mammals, we learned in school, are a class of vertebrates.

The New York Times - Arts

Crossed cubes are a class of promising parallel communication patterns.

Optik - International Journal for Light and Electron Optics

Ketones are a class of important organic compounds.

Metabolic Engineering

Fullerenes are a class of molecules composed entirely of carbon.

Nanotechnology Applications for Clean Water Solutions for Improving Water Quality

Fluorinated indolylfulgides are a class of photochromic organic compounds.

Journal of Photochemistry and Photobiology A: Chemistry

In their bashing of the Leap Manifesto, pundits pretend they are a class of disinterested commentators.

The Guardian

Neonicotinoids are a class of pesticide which act as an insect nerve agent.

The Guardian

Leptons are a class of particles that do not interact strongly with matter.

The New York Times

Antacids are a class of medications that act by directly neutralizing gastric acid.

Nature

Therefore,, are a class of consistent distributions on.

Journal of Inequalities and Applications

Linearisable discrete systems are a class of their own.

Advances in Difference Equations

Expert writing Tips

Best practice

When using the phrase "are a class of", ensure that the characteristics defining the class are clearly stated to provide context and avoid ambiguity.

Common error

Avoid using "are a class of" when referring to items that are only superficially similar. Make sure the members of the class share fundamental characteristics, not just superficial resemblances.

Linguistic Context

The phrase "are a class of" serves as a definitional tool, categorizing entities based on shared characteristics. As Ludwig AI indicates, the phrase is grammatically correct and usable in written English. It is used to establish a hierarchical relationship where the subject belongs to a broader classification.

Expression frequency: Very common

Frequent in

Science

63%

News & Media

24%

Wiki

2%

Less common in

Formal & Business

0%

Encyclopedias

0%

Social Media

0%

Ludwig's WRAP-UP

In summary, the phrase "are a class of" is a grammatically sound and frequently employed expression used for categorization and definition. As Ludwig AI confirms, it is correct and suitable for use in written English. Predominantly found in scientific and news contexts, this phrase is best utilized when clearly defining the shared characteristics of the items being classified. To avoid vagueness, ensure that the defining features of the class are explicitly stated. For varied expression, consider alternatives such as "belong to a category of" or "are a type of". This analysis underscores the importance of precise categorization for clear and effective communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

belong to a category of

Replaces "are a class of" with a phrase emphasizing categorization.

are a type of

Substitutes "class" with "type", focusing on a specific kind or variety.

can be categorized as

Emphasizes the act of categorization rather than inherent classification.

fall under the umbrella of

Uses a metaphor to indicate inclusion within a broader group.

constitute a group of

Highlights the formation of a group based on shared characteristics.

are considered to be

Introduces an element of subjective assessment or general opinion.

are known as

Focuses on the common name or designation of a group.

are defined as

Emphasizes a formal or technical definition.

are characterized by

Highlights the distinguishing features of a group.

encompass a range of

Suggests a diverse collection within a category.

FAQs

How can I use "are a class of" in a sentence?

Use "are a class of" to categorize entities that share specific traits. For example, "Opioids "are a class of" drugs that include oxycodone, hydrocodone, codeine, morphine, fentanyl, and many others."

What are some alternatives to "are a class of"?

You can use phrases like "belong to a category of", "are a type of", or "can be categorized as" depending on the context.

Is it correct to say "is a class of" instead of "are a class of"?

No, use "is a class of" when referring to a singular entity that represents the entire class. For plural entities, the correct form is ""are a class of"."

What's the difference between "are a class of" and "include"?

"Are a class of" defines a category, while "include" lists members within that category. For example, "Mammals are a class of vertebrates" defines mammals, while "Mammals include humans, dogs, and cats" lists examples of mammals.