amoeba: meaning, definition, pronunciation and examples
C1Academic / Scientific / Technical / Occasionally literary or metaphorical.
Quick answer
What does “amoeba” mean?
A microscopic, single-celled organism of the phylum Amoebozoa, characterized by its constantly changing shape as it moves and feeds by extending temporary projections called pseudopodia.
Audio
Pronunciation
Definition
Meaning and Definition
A microscopic, single-celled organism of the phylum Amoebozoa, characterized by its constantly changing shape as it moves and feeds by extending temporary projections called pseudopodia.
A basic, simple, or primitive entity that is capable of indefinite change or division. Often used metaphorically to describe something that is formless, lacks a fixed structure, or undergoes constant, uncontrolled growth.
Dialectal Variation
British vs American Usage
Differences
British English primarily uses the spelling 'amoeba'. American English uses both 'amoeba' and 'ameba', with 'ameba' being the preferred variant in formal scientific contexts (e.g., publications from the American Society for Microbiology).
Connotations
The metaphorical use is slightly more common in British English prose. The term carries a slight connotation of primitiveness and simplicity in both dialects.
Frequency
Low-frequency in everyday conversation but standard in biological and educational contexts. The metaphorical use is rare but not unusual in high-register writing.
Grammar
How to Use “amoeba” in a Sentence
the amoeba + verb (divides, moves, feeds)amoeba of + abstract noun (e.g., an amoeba of bureaucracy)Vocabulary
Collocations
Examples
Examples of “amoeba” in a Sentence
verb
British English
- The organisation began to amoeba into several distinct factions.
American English
- The software startup amoebaed into three separate product teams.
adverb
British English
- The team reorganized amoeba-fashion, with roles shifting daily.
American English
- Ideas spread amoeba-like throughout the online community.
adjective
British English
- His thinking was amoeba-like, absorbing ideas without a core structure.
American English
- They criticised the plan for its amoebic lack of concrete steps.
Usage
Meaning in Context
Business
Rarely used, except metaphorically: 'The startup's structure was an amoeba, adapting daily to new market pressures.'
Academic
Common in biology textbooks: 'The amoeba engulfs its prey through a process called phagocytosis.'
Everyday
Mostly in educational or science-related contexts: 'We looked at amoebas under the microscope in school today.'
Technical
Standard in microbiology and parasitology: 'The patient was infected with the pathogenic amoeba Naegleria fowleri.'
Vocabulary
Synonyms of “amoeba”
Strong
Neutral
Vocabulary
Antonyms of “amoeba”
Watch out
Common Mistakes When Using “amoeba”
- Misspelling as 'amobea' or 'ameoba'.
- Using plural 'amoebas' (more common) vs. 'amoebae' (scientific/latinate). Both are accepted.
- Confusing it with algae or other protists.
FAQ
Frequently Asked Questions
Historically classified as a simple animal, modern taxonomy places amoebas in their own kingdom, Protista (or Amoebozoa). They are neither plants nor animals.
Both are correct. 'Amoebas' is more common in general English, while 'amoebae' (the original Latin/Greek plural) is often used in scientific contexts.
Most amoeba species are harmless, but a few are pathogenic. The most infamous is Naegleria fowleri, the 'brain-eating amoeba', and Entamoeba histolytica, which causes amoebic dysentery.
Its defining characteristics—a constantly changing shape, simple structure, and method of growth by expansion and division—make it a powerful metaphor for anything formless, adaptable, or prone to uncontrolled, undirected growth.
A microscopic, single-celled organism of the phylum Amoebozoa, characterized by its constantly changing shape as it moves and feeds by extending temporary projections called pseudopodia.
Amoeba is usually academic / scientific / technical / occasionally literary or metaphorical. in register.
Amoeba: in British English it is pronounced /əˈmiːbə/, and in American English it is pronounced /əˈmiːbə/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Politics in that region is like a shapeless amoeba, constantly shifting alliances.”
- “The committee was an organizational amoeba with no clear leadership.”
Learning
Memory Aids
Mnemonic
An AMOEBA Moves, Oscillates, Engulfs, and Bifurcates Amorphously.
Conceptual Metaphor
FORM IS FLUID / CHANGE IS MOVEMENT (e.g., 'The political movement was an amoeba, changing shape to absorb new factions.').
Practice
Quiz
In which context is the word 'amoeba' used metaphorically?