Our most common search themes:
The plural of diagnosis is diagnoses.
The Plural of DiagnosisThe plural of diagnosis is diagnoses.
- Hippocrates was known to make diagnoses by smelling his patients' sweat.
- In a differential diagnosis, a physician rules out the diagnoses until a final determination can be made.
|Type||Example of Type||Forming the Plural||Plural|
|Most Nouns|| lamp
|add s|| lamps
|Noun Ending s, sh, ch, x or z|| box
|add es|| boxes
|Nouns ending [consonant] o||
|add either s or es
(There are no rules for this - you have to know.)
|Nouns ending [vowel] o|| patio
|add s|| patios
|Nouns ending [consonant] y|| story
|change the y to an i and add es|| stories
|Nouns ending [vowel] y|| donkey
|add s|| donkey
|Nouns ending f or fe|| dwarf
|ves and/or s
(There are no rules - you have to know.)
hooves or hoofs
|Nouns ending is|| diagnosis
|change the is to es|| diagnoses
|some nouns undergo a vowel or letters change|| men
|More exceptions|| salmon
|some nouns do not change at all|| salmon
|Foreign rulings|| fungus
|some nouns adopt foreign rulings|| fungi
Why Is There Confusion over the Plural of Diagnosis?Diagnoses is the only way to make the noun diagnosis plural.
Confusion arises because some mistakenly believe that all nouns ending in s should form a plural that adds es to the end of the word. When a noun ends with is, you need to replace the is with an es to form the plural. This is because its plural form derives from Greek.