Grammar Simplified

Decoding the Grammar of Diagnosis: Understanding Plural Form and Usage

The Plural of ‘Diagnosis’: Understanding the Rules and DefinitionsHave you ever wondered about the plural form of the word ‘diagnosis’? Maybe you’re a medical professional or a curious individual who wants to expand their knowledge of grammar.

Either way, in this article, we will explore the pluralization rules for nouns and discover the correct plural form of ‘diagnosis’. Additionally, we will delve into the definitions provided by trusted sources such as Merriam-Webster and the Cambridge Dictionary.

Get ready to expand your understanding of both grammar and terminology!

Plural of ‘Diagnosis’

Understanding the rules for pluralizing nouns is essential to grasp the concept of forming the plural form of ‘diagnosis’. Here are the key subtopics:

Pluralization rules for nouns

Nouns follow specific rules when forming their plural forms. Here are a few essential rules to keep in mind:

– Most nouns add an ‘s’ at the end to form the plural, e.g., ‘books’, ‘chairs’.

– Nouns ending in ‘s’, ‘x’, ‘z’, ‘ch’, or ‘sh’ add an ‘es’ to their singular form, e.g., ‘buses’, ‘boxes’. – Nouns ending in ‘y’ drop the ‘y’ and add ‘ies’ at the end, e.g., ‘berries’, ‘parties’.

Plural form of ‘diagnosis’

The word ‘diagnosis’ is a unique noun with a Greek origin. As per the conventional pluralization rules, one might expect it to become ‘diagnosises’.

However, this is not correct. The correct plural form of ‘diagnosis’ is ‘diagnoses’.

This plural form aligns with the general rule of adding ‘es’ to nouns ending in ‘s’ or ‘is’. Hence, ‘diagnoses’ is the proper way to refer to multiple diagnoses.

Definition and Meaning of ‘Diagnosis’

Understanding the meaning and definition of a word is crucial to use it accurately. Let’s explore the definitions of ‘diagnosis’ provided by reputable sources:

Merriam-Webster’s definition

According to Merriam-Webster, ‘diagnosis’ is defined as “the art or act of identifying a disease from its signs and symptoms.” This definition emphasizes the diagnostic process and the skill required to identify diseases accurately.

Cambridge Dictionary’s definition

The Cambridge Dictionary defines ‘diagnosis’ as “a judgment about what a particular illness or problem is, made after examining it.” This definition highlights the aspect of reaching a conclusion about an illness or problem based on an examination. Conclusion:

By exploring the pluralization rules for nouns and understanding the correct plural form of ‘diagnosis’, we can now confidently refer to multiple diagnoses as ‘diagnoses’.

Additionally, understanding the definitions from both Merriam-Webster and the Cambridge Dictionary provides clarity regarding the meaning and usage of ‘diagnosis’. This newfound knowledge will not only enhance your grammar skills but also deepen your understanding of medical terminology.

Keep exploring the English language, and let your knowledge flourish!

Usage of ‘Diagnosis’ and ‘Diagnoses’ in a Sentence

Now that we have a clear understanding of the plural form of ‘diagnosis’ and its definition, it’s time to explore how to use both the singular and plural forms in sentences. By seeing examples in context, we can further solidify our understanding of this medical term.

Let’s dive into this topic:

Examples of using the singular form in a sentence

1. The doctor provided a diagnosis for the patient’s symptoms.

2. Her diagnosis was that the patient had a viral infection.

3. The accurate diagnosis of this rare disease was challenging for the medical team.

4. He sought a second opinion after receiving a diagnosis of diabetes.

5. The diagnosis of cancer came as a shock to the patient and their family.

In these examples, we see ‘diagnosis’ being used as a singular noun to describe the act or judgment of identifying a disease or problem. Each sentence showcases the importance of a single diagnosis in medical contexts.

Examples of using the plural form in a sentence

1. The hospital reported a significant increase in diagnoses of COVID-19 cases.

2. The doctor discussed various diagnoses with the patients, explaining the potential treatment options for each.

3. We need to consider the different diagnoses provided by the specialists before reaching a conclusion.

4. The team of doctors worked together to confirm the accurate diagnoses of the patients.

5. Differentiate between the various diagnoses to avoid confusion and provide appropriate treatment.

In these examples, ‘diagnoses’ is used to refer to multiple instances of identifying illnesses or problems. It’s crucial to note the correct plural form to maintain coherence and accuracy in professional and academic writing.

Singular and Plural Possessive Forms of ‘Diagnosis’

As we explore the usage of ‘diagnosis’ and ‘diagnoses’ in sentences, it’s essential to understand how to express possession in both singular and plural forms. Possessive forms help us indicate ownership or relationship to a given noun.

Let’s dive into this topic:

Singular possessive form

1. The doctor’s diagnosis was accurate and led to the appropriate treatment.

2. Her expertise in her field played a significant role in the diagnosis’s accuracy.

3. The patient’s early symptoms were crucial in the quick diagnosis’s determination.

In these examples, the singular possessive form uses an apostrophe and an ‘s’ (‘s) at the end of the noun ‘diagnosis’ to indicate ownership or relationship in singular contexts.

Plural possessive form

1. The department chairs’ diagnoses showed a clear understanding of the patients’ conditions.

2. The specialists’ diagnoses’ accuracy was evident in the successful treatment outcomes.

3. The students’ thorough research contributed to the multiple diagnoses’ precision.

In these examples, the plural possessive form is used to indicate ownership or relationship to multiple instances of ‘diagnoses’. Here, an apostrophe is added after the ‘s’ at the end of the plural noun ‘diagnoses’.


By understanding how to use both the singular and plural forms of ‘diagnosis’ in sentences, we can effectively communicate within medical and academic contexts. Additionally, grasping the concept of possessive forms allows us to indicate ownership or relationship to diagnoses accurately.

Armed with this knowledge, we can confidently navigate conversations and written works discussing various diagnoses. So, whether you use ‘diagnosis’ or ‘diagnoses’ in your professional or personal life, you are equipped with the grammatical understanding to express yourself accurately.

Keep practicing and expanding your linguistic horizons!

Concluding Thoughts on ‘Diagnosis’ and ‘Diagnoses’

As we conclude our exploration of the plural form of ‘diagnosis’ and its usage in sentences, let’s reflect on the challenges of pluralizing certain words and the specific rule for pluralizing ‘diagnosis’. By delving deeper into these aspects, we can further appreciate the intricacies of language.

Difficulty in pluralizing words

Pluralizing words may seem like a straightforward task, but the English language can be quite complex when it comes to pluralization rules. Some nouns follow predictable patterns, while others have irregular or unconventional forms.

This can lead to confusion and difficulty when trying to determine the correct plural form. While the general rule is to add an ‘s’ or ‘es’, certain exceptions can make the process even more challenging.

Pluralization rule for ‘diagnosis’

Despite the complexity of pluralizing certain words, the plural form of ‘diagnosis’ follows a relatively straightforward rule. By adding an ‘es’ at the end of ‘diagnosis’, we transform it into ‘diagnoses’.

This adheres to the general rule of adding ‘es’ to words ending in ‘s’ or ‘is’ when forming their plural forms. Although it may initially seem counterintuitive, mastering this rule allows us to accurately communicate multiple instances of diagnoses without confusion.

Understanding the specific rule for pluralizing ‘diagnosis’ showcases the importance of learning the individual rules for different words. While some words may follow standard patterns, others require specific attention.

By being aware of these rules, we can ensure clear and precise communication in our professional and academic endeavors. Conclusion:

Throughout this article, we have explored the plural form of ‘diagnosis’ and its usage in sentences, delved into its definition and meaning according to trusted sources like Merriam-Webster and the Cambridge Dictionary, examined examples of its singular and plural forms in various contexts, and discussed the possessive forms of ‘diagnosis’.

We have also reflected on the challenges of pluralizing words in general and highlighted the specific rule for achieving the plural form of ‘diagnosis’. Armed with this knowledge, we can confidently navigate the complexities of language and utilize ‘diagnosis’ and ‘diagnoses’ accurately in our conversations and written works.

Language is an ever-evolving entity, and it is through dedicated exploration and learning that we can enhance our understanding of its nuances. By continuously expanding our knowledge, not only can we communicate effectively, but we can also appreciate the richness and beauty of the English language.

So, let us embrace the intricacies of pluralization rules and confidently use ‘diagnosis’ and ‘diagnoses’ in our linguistic endeavors. Happy exploring!

In conclusion, this article has explored the plural form of ‘diagnosis’ and its usage in sentences, provided definitions from reputable sources, examined examples of singular and plural forms, and discussed the possessive forms of ‘diagnosis’.

By understanding the specific pluralization rule for ‘diagnosis’ and the challenges of pluralizing words in general, we can communicate accurately in medical and academic contexts. The importance of mastering these linguistic intricacies cannot be overstated, as it ensures clear and precise communication.

So, let us keep exploring language, embracing its complexities, and using ‘diagnosis’ and ‘diagnoses’ confidently in our everyday interactions.

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