Meaning & use
conch
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Meanings
nouncountable
A large sea snail with a thick spiral shell, or the shell itself used for decoration or as a horn.
Grammar: Countable; the shell meaning is often what tourists and beachcombers refer to.
Patterns
- a conch shell
- blow a conch
- find a conch on the beach
We found an empty conch shell near the rocks.
The lifeguard blew a conch to signal the end of the race.
nouncountablemedicalspecialist
In anatomy, a shell-like curved structure, especially inside the nose.
Grammar: Specialist use; often plural in medical descriptions.
Patterns
- nasal conch
- inferior conch
The surgeon discussed the swollen nasal conch with the patient.
CT images showed the shape of the conch clearly.
Word forms
| plural | conchs |
|---|---|
| plural (less common) | conches |
Common combinations
- conch shell
- She placed a pink conch shell on the bookshelf.
- blow a conch
- At sunrise, someone blew a conch beside the lagoon.
- queen conch
- The queen conch is prized for its large flared shell.
Synonyms and how they differ
- seashell
- “Seashell” is any shell from the sea; a conch is a particular large spiral type.
- shellfish
- “Shellfish” can include the animal as food; “conch” names the snail/shell and is less about cuisine.
Word family
- conchology noun
- The study of shells and the animals that make them.
- conchoidal adjective
- Technical: having a smooth curved fracture like a shell, used for some rocks and glass.
Commonly confused: conch or coach? conch or conk?
conch vs coach
“Coach” sounds similar in fast speech but means a trainer, bus, or comfortable class of travel.
conch vs conk
“Conk” means hit on the head, nose slang, or a fungus on trees; it shares the /kɒŋk/ sound.
Practice
Which sentence uses “conch” correctly?
Choose one answer.
A conch is a sea snail/shell, so a diver can photograph one crawling. The other options confuse it with coach, conk, or an impossible subject.
Make it your own
Write a sentence using “conch”, then check it and compare it with the examples above.