Is 'motile' a common word?

No, it is a technical/scientific term. You will almost never hear it in everyday conversation.

What is the difference between 'mobile' and 'motile'?

'Mobile' is general and can apply to anything that can be moved or moves easily (e.g., mobile phone, mobile home). 'Motile' is specifically biological and means capable of independent, spontaneous movement (e.g., a motile cell).

Can 'motile' be used for people?

It would be highly unusual and technical. A doctor might refer to a patient's 'motile joints' in a specialist context, but normally you would say 'mobile' or 'able to move'.

What is the noun form of 'motile'?

The noun is 'motility' (e.g., 'gastrointestinal motility', 'sperm motility').

motile

UK/ˈməʊ.taɪl/US/ˈmoʊ.t̬əl/

Technical/Formal

My Flashcards

Definition

Meaning

Capable of motion; able to move spontaneously and actively.

In a biological or technical context, referring to cells, organisms, or microscopic structures that are capable of independent movement.

Linguistics

Semantic Notes

Primarily a biological/medical/scientific term. Rarely used in a metaphorical sense for human movement (e.g., 'motile fingers' would be unusual). The related noun is 'motility'.

Dialectal Variation

British vs American Usage

Differences

No significant differences in definition or usage. Pronunciation differs slightly.

Connotations

Identical. Strictly technical/scientific in both.

Frequency

Equally low frequency in both, confined to specialist fields.

Vocabulary

Collocations

strong

spermcellsbacteriaorganismsflagellaciliary

medium

highly motilebecome motileremain motilemicroscopicstructures

weak

protozoagametesmicroorganismslarval stage

Grammar

Valency Patterns

be + motileremain/stay + motilefind + [object] + motileobserve + [object] + motile

Vocabulary

Synonyms

Strong

locomotiveself-propelling

Neutral

mobilemoving

Weak

activedynamic

Vocabulary

Antonyms

immotileimmobilesessilestaticstationary

Phrases

Idioms & Phrases

“[No common idioms]”

Usage

Context Usage

Business

Virtually never used.

Academic

Used in biology, microbiology, medicine, and related life sciences.

Everyday

Extremely rare, would be considered an overly technical word for 'able to move'.

Technical

Core descriptive term in relevant fields (e.g., 'motile sperm count' in fertility analysis).

Examples

By Part of Speech

verb

British English

[Not a standard verb; the verb is 'to move']

American English

[Not a standard verb; the verb is 'to move']

adverb

British English

[Not a standard adverb; use 'in a motile manner']

American English

[Not a standard adverb; use 'in a motile manner']

adjective

British English

The lab report indicated a satisfactory number of motile sperm.
Under the microscope, we observed highly motile bacteria darting about.

American English

A key characteristic of the species is its motile larval stage.
The sample showed few motile organisms after treatment.

Examples

By CEFR Level

[Level too low for this word]

[Level too low for this word]

Some bacteria are motile and can swim towards nutrients.
The doctor explained that motility is important for fertility.

The study compared the motile behaviour of the pathogen in different pH environments.
A deficiency in the protein structure rendered the cilia non-motile.

Learning

Memory Aids

Mnemonic

Think: 'MOTOR' + 'ile' (like 'mobile'). A motile cell has its own tiny motor to move.

Conceptual Metaphor

AUTONOMOUS AGENCY / SELF-POWERED MOVEMENT.

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Не путать с "мотив" (motive) или "моторный" (relating to an engine). Близкий русский эквивалент — "подвижный", "способный к самостоятельному движению".
В биологии — "жгутиковый" (flagellated) часто описывает мотильные организмы, но это не синонимы.

Common Mistakes

Using it to describe large objects or people (e.g., 'The dancer is very motile').
Confusing spelling with 'motivate' or 'motive'.
Pronouncing it as /məʊˈtiːl/ (like 'motel').

Practice

Quiz

Fill in the gap

For successful fertilisation, a high percentage of sperm must be .

Multiple Choice

In which context is the word 'motile' MOST likely to be used correctly?

FAQ

Frequently Asked Questions

: No, it is a technical/scientific term. You will almost never hear it in everyday conversation.
: 'Mobile' is general and can apply to anything that can be moved or moves easily (e.g., mobile phone, mobile home). 'Motile' is specifically biological and means capable of independent, spontaneous movement (e.g., a motile cell).
: It would be highly unusual and technical. A doctor might refer to a patient's 'motile joints' in a specialist context, but normally you would say 'mobile' or 'able to move'.
: The noun is 'motility' (e.g., 'gastrointestinal motility', 'sperm motility').