mollusc: meaning, definition, pronunciation and examples
C1-C2Formal, Technical, Academic, Literary
Quick answer
What does “mollusc” mean?
A member of a large group of invertebrate animals with soft bodies, most of which are enclosed in a hard shell. Examples include snails, mussels, octopuses, and squid.
Audio
Pronunciation
Definition
Meaning and Definition
A member of a large group of invertebrate animals with soft bodies, most of which are enclosed in a hard shell. Examples include snails, mussels, octopuses, and squid.
Used metaphorically to describe a person who is weak-willed, indecisive, or lacking in energy and initiative.
Dialectal Variation
British vs American Usage
Differences
The primary spelling is 'mollusc' in British English and 'mollusk' in American English. Both refer to the same animal phylum.
Connotations
Identical in biological/technical contexts. The metaphorical, informal use (a weak person) is slightly more established in British English.
Frequency
The word is of medium-low frequency in both dialects, primarily appearing in scientific, educational, or nature-related contexts. The US spelling 'mollusk' is more common in global scientific publishing.
Grammar
How to Use “mollusc” in a Sentence
NOUN + of + mollusc (e.g., 'a class of mollusc')ADJECTIVE + mollusc (e.g., 'marine mollusc')mollusc + VERB (e.g., 'the mollusc burrows')Vocabulary
Collocations
Examples
Examples of “mollusc” in a Sentence
verb
British English
- (Not standard; verb form does not exist in common usage.)
American English
- (Not standard; verb form does not exist in common usage.)
adverb
British English
- (Not standard; adverb form does not exist.)
American English
- (Not standard; adverb form does not exist.)
adjective
British English
- The molluscan nervous system is fascinating.
- Molluscan fauna were studied.
American English
- The molluscan nervous system is fascinating.
- Molluscan fauna were studied.
Usage
Meaning in Context
Business
Virtually unused, except perhaps in specific industries like aquaculture or seafood export.
Academic
Common in biology, zoology, marine science, and palaeontology texts and lectures.
Everyday
Rare in casual conversation unless discussing nature, cooking (e.g., seafood), or using the metaphorical insult.
Technical
The standard term in taxonomy and malacology (the study of molluscs).
Vocabulary
Synonyms of “mollusc”
Neutral
Vocabulary
Antonyms of “mollusc”
Watch out
Common Mistakes When Using “mollusc”
- Misspelling as 'mollusk' in a British English context or 'mollusc' in an American one is the main orthographic issue.
- Mispronunciation: stressing the second syllable (e.g., /məˈlʌsk/).
- Using it as a general term for all shellfish (it excludes crustaceans like crabs and shrimp).
FAQ
Frequently Asked Questions
'Shellfish' is a culinary and casual term covering both molluscs (e.g., clams) and crustaceans (e.g., shrimp). 'Mollusc' is the precise scientific term for animals in the phylum Mollusca, which includes shell-less animals like octopuses.
Yes. Despite its intelligence and lack of a shell, the octopus is biologically classified within the mollusc phylum, specifically in the class Cephalopoda, which also includes squid and cuttlefish.
It is pronounced /ˈmɒləsk/, with the stress on the first syllable, which rhymes with 'doll', followed by a schwa sound and a final 'sk'.
Informally, yes, particularly in British English. Calling someone a 'mollusc' implies they are spineless, sluggish, or indecisive, drawing a metaphorical link to the perceived nature of the animal.
A member of a large group of invertebrate animals with soft bodies, most of which are enclosed in a hard shell. Examples include snails, mussels, octopuses, and squid.
Mollusc is usually formal, technical, academic, literary in register.
Phrases
Idioms & Phrases
- “to come out of one's shell (related conceptually, but not a direct idiom with 'mollusc')”
Learning
Memory Aids
Mnemonic
Imagine a MOLLY the fish USing a C(lamshell) as a hat. MOLLY-US-C -> MOLLUSC.
Conceptual Metaphor
A MOLLUSC IS A WEAK/INDECISIVE PERSON (e.g., 'Don't be such a mollusc, make a decision!').
Practice
Quiz
In which context is the word 'mollusc' LEAST likely to be used?