Plural of Viscus
In anatomical usage, singular “viscus” has the classical plural “viscera.” The irregular number change makes this a substantive plural-form guide rather than a routine spelling transformation.
The plural of anatomical “viscus” is “viscera.” This is a classical irregular plural, so standard English does not form the ordinary anatomical plural by simply adding -s.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| one internal organ in the anatomical sense | viscus | Use the singular form. |
| more than one in the anatomical sense | viscera | Use the classical irregular plural. |
| ordinary collective reference | viscera | The same plural form may be used collectively; context controls the precise sense. |
Quick tests
Meaning / construction test
Are you naming more than one “viscus” in the anatomical sense?
If yes: Use “viscera.”
If no: Use “viscus” for one; do not create a regular plural by simply adding -s.
Examples
The description identifies one viscus.
One anatomical organ takes the singular “viscus.”
The section describes the abdominal viscera.
“Viscera” is the established plural of anatomical “viscus.”
The term viscera is used collectively in the passage.
The plural form can also appear collectively; the surrounding context supplies the precise sense.
Further guidance
Core difference
Use “viscus” for one internal organ in the relevant anatomical sense and “viscera” for the plural.
Fast Test
When the intended meaning is multiple internal organs, “viscera” is the established plural form.
Usage Boundary
“Viscera” also appears collectively in ordinary language; specialist anatomical context should control the precise sense.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Viscus — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Learner-dictionary evidence for the classical plural “viscera” of “viscus.”