Is 'villi' singular or plural?

It is plural. The singular form is 'villus'.

In which part of the body are villi most commonly discussed?

In the small intestine, where they are crucial for absorbing nutrients.

Can 'villi' refer to structures outside the human body?

Yes, in botany, root hairs are sometimes referred to as villi, and the term can apply to similar projections in other biological tissues.

What is the difference between 'villi' and 'microvilli'?

Villi are larger, macroscopic folds of the mucosal layer. Microvilli are microscopic projections on the surface of individual cells (e.g., enterocytes) that make up the villi, further increasing surface area.

villi

Low

UK/ˈvɪlaɪ/US/ˈvɪlaɪ/

Technical/Scientific

My Flashcards

Definition

Meaning

The plural of villus; tiny, hair‑like projections on mucous membranes, especially in the small intestine.

In biology, more generally, any small, slender, finger‑like projections from a surface, such as on plant roots or certain tissues.

Linguistics

Semantic Notes

Always plural. The singular 'villus' is rarely used in general language but is standard in technical contexts.

Dialectal Variation

British vs American Usage

Differences

No significant differences in usage or meaning.

Connotations

Purely scientific/medical term in both varieties.

Frequency

Equally low frequency in both, confined to biological and medical contexts.

Vocabulary

Collocations

strong

intestinal villismall intestine villimucosal villi

medium

microvilliabsorption by villisurface of villi

weak

damaged villifinger‑like villilining of villi

Grammar

Valency Patterns

The villi [verb]...[Adj] villi in the...Villi are located...Absorption occurs via the villi.

Vocabulary

Synonyms

Strong

microvilli (if referring to the smaller cellular structures)

Neutral

projectionsprocesses

Weak

foldsridges

Vocabulary

Antonyms

cryptspitsdepressions

Phrases

Idioms & Phrases

“[No common idioms]”

Usage

Context Usage

Business

Not used.

Academic

Used in biology, medicine, and anatomy papers/lectures to describe anatomical structures.

Everyday

Virtually never used in everyday conversation.

Technical

Core term in histology, gastroenterology, and plant biology for structures that increase surface area.

Examples

By CEFR Level

[Too technical for A2]

The doctor explained that food is absorbed through the villi.
The diagram showed the villi in the intestine.

The villi greatly increase the surface area for nutrient absorption in the small intestine.
In coeliac disease, the immune system damages these villi.

Histological analysis revealed atrophy and blunting of the duodenal villi, consistent with the diagnosis.
The efficiency of absorption is contingent upon the health and density of the intestinal villi.

Learning

Memory Aids

Mnemonic

Think of 'VILLI' – Very Important Little Latticed Intestines (for absorption). They look like tiny fingers (villi) in the gut.

Conceptual Metaphor

FINGERS OF THE INTESTINE (for absorption), CARPET PILE (describing the dense, hair‑like covering).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Do not confuse with 'вилы' (pitchfork). The Russian biological term is 'ворсинки' (singular 'ворсинка').

Common Mistakes

Using 'villi' as a singular noun (e.g., 'a villi').
Misspelling as 'vili' or 'villy'.
Confusing with 'villa' (a house).

Practice

Quiz

Fill in the gap

Nutrients from digested food pass into the bloodstream through the lining the small intestine.

Multiple Choice

What is the primary function of intestinal villi?

FAQ

Frequently Asked Questions

: It is plural. The singular form is 'villus'.
: In the small intestine, where they are crucial for absorbing nutrients.
: Yes, in botany, root hairs are sometimes referred to as villi, and the term can apply to similar projections in other biological tissues.
: Villi are larger, macroscopic folds of the mucosal layer. Microvilli are microscopic projections on the surface of individual cells (e.g., enterocytes) that make up the villi, further increasing surface area.