microfilament: meaning, definition, pronunciation and examples
LowSpecialised / Technical
Quick answer
What does “microfilament” mean?
A thin, solid, rod-like structure made of actin protein, found in the cytoskeleton of eukaryotic cells, crucial for cell shape, movement, and division.
Audio
Pronunciation
Definition
Meaning and Definition
A thin, solid, rod-like structure made of actin protein, found in the cytoskeleton of eukaryotic cells, crucial for cell shape, movement, and division.
In a broader technological or metaphorical sense, can refer to any extremely thin, thread-like structure, but this usage is rare and almost always analogical to the biological term.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Pronunciations differ slightly (see IPA).
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low frequency in specialised biological contexts in both regions.
Grammar
How to Use “microfilament” in a Sentence
The [noun] is composed of/bundled into microfilaments.Microfilaments interact with/bind to [protein name].[Drug/Toxin] disrupts/ stabilises microfilaments.Vocabulary
Collocations
Examples
Examples of “microfilament” in a Sentence
verb
British English
- The protein complex helps to microfilament the cell cortex.
- (Note: 'microfilament' as a verb is non-standard and highly marked; 'form microfilaments' or 'polymerise into microfilaments' is correct.)
American English
- The drug treatment caused the actin to microfilament rapidly. (Non-standard; see British note.)
adverb
British English
- (No standard adverbial form exists.)
American English
- (No standard adverbial form exists.)
adjective
British English
- The microfilament structure was visualised using fluorescence. (Attributive noun use, common)
American English
- Researchers observed a distinct microfilament network. (Attributive noun use, common)
Usage
Meaning in Context
Business
Not used.
Academic
Exclusively used in biology, biochemistry, and medicine textbooks and research papers.
Everyday
Virtually never used.
Technical
The primary domain. Used when describing cell structure, motility, cytology, and related lab techniques.
Vocabulary
Synonyms of “microfilament”
Strong
Neutral
Weak
Vocabulary
Antonyms of “microfilament”
Watch out
Common Mistakes When Using “microfilament”
- Misspelling as 'microfliament'.
- Confusing it with 'microtubule' (which is thicker and made of tubulin).
- Using it in non-biological contexts.
FAQ
Frequently Asked Questions
They provide mechanical support, determine cell shape, enable cell movement (crawling, contraction), and facilitate intracellular transport and cell division.
No. They are both part of the cytoskeleton but are different structures. Microfilaments are thinner, made of actin, and involved in movement and shape. Microtubules are thicker, hollow tubes made of tubulin, and act as railways for transport and form the mitotic spindle.
In the cytoplasm of all eukaryotic cells (animal, plant, fungal, protist). They are not found in prokaryotic cells (bacteria and archaea).
Generally, no. Individual microfilaments are about 7 nanometres in diameter, which is below the resolution limit of a standard light microscope. They are visualised using electron microscopy or specialised fluorescent tagging techniques under a fluorescence microscope.
A thin, solid, rod-like structure made of actin protein, found in the cytoskeleton of eukaryotic cells, crucial for cell shape, movement, and division.
Microfilament is usually specialised / technical in register.
Microfilament: in British English it is pronounced /ˈmaɪ.krəʊ.ˌfɪl.ə.mənt/, and in American English it is pronounced /ˈmaɪ.kroʊ.ˌfɪl.ə.mənt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of a MICROscopic FILAMENT or thread inside a cell. It's like the cell's internal scaffolding or muscle fibres.
Conceptual Metaphor
CELL IS A BUILDING/STRUCTURE (microfilaments as support beams or reinforcing rods). CELL IS A MACHINE (microfilaments as cables or moving parts).
Practice
Quiz
What is the primary protein constituent of a microfilament?