percussion cap: meaning, definition, pronunciation and examples
C2Specialized/Technical (Historical, Military, Firearms)
Quick answer
What does “percussion cap” mean?
A small, thin copper or brass cup containing a small amount of shock-sensitive explosive compound, placed on the nipple of a muzzle-loading firearm, which explodes when struck by the hammer to ignite the main powder charge.
Audio
Pronunciation
Definition
Meaning and Definition
A small, thin copper or brass cup containing a small amount of shock-sensitive explosive compound, placed on the nipple of a muzzle-loading firearm, which explodes when struck by the hammer to ignite the main powder charge.
A critical, often small, component that initiates a larger process through a sharp impact or stimulus. In broader metaphorical use, it can refer to any initial trigger for a sequence of events.
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Both dialects use the same term, though American English might be slightly more familiar with it due to historical muzzle-loading traditions (e.g., the American Civil War era, pioneer history).
Connotations
Historical, antiquated, precise.
Frequency
Very low frequency in both dialects, but might appear marginally more often in American English within historical military or hunting contexts.
Grammar
How to Use “percussion cap” in a Sentence
VERB + percussion cap: fit, place, prime with, strike, invent, removeADJ + percussion cap: copper, brass, loose, faulty, spentPREP + percussion cap: a firearm with a percussion cap, the hammer on the percussion capVocabulary
Collocations
Examples
Examples of “percussion cap” in a Sentence
verb
British English
- [The term is a noun compound; no standard verb form exists]
American English
- [The term is a noun compound; no standard verb form exists]
adverb
British English
- [Not applicable]
American English
- [Not applicable]
adjective
British English
- [The term is a noun compound; adjectival use is 'percussion-cap' as in 'percussion-cap pistol']
American English
- [The term is a noun compound; adjectival use is 'percussion cap' as in 'percussion cap rifle']
Usage
Meaning in Context
Business
Not applicable.
Academic
Used in historical texts, papers on military technology, and the history of firearms.
Everyday
Virtually never used in everyday conversation outside specific hobbies.
Technical
Essential term in historical firearms manuals, black powder shooting, and antique arms restoration.
Vocabulary
Synonyms of “percussion cap”
Strong
Neutral
Weak
Vocabulary
Antonyms of “percussion cap”
Watch out
Common Mistakes When Using “percussion cap”
- Misspelling as 'percussion cap' (with a space) is standard. 'Percussion-cap' (hyphenated) is an older variant.
- Confusing it with a modern bullet 'primer', which is integrated into a cartridge.
- Using it as a verb (e.g., 'He percussion-capped the gun' is non-standard).
FAQ
Frequently Asked Questions
Yes, but only by black powder shooting enthusiasts, historical re-enactors, and in some parts of the world for traditional hunting. Modern ammunition uses integrated primers.
It was superseded by self-contained metallic cartridges (beginning in the mid-19th century), which incorporate the primer, powder, and projectile into a single unit.
It is standardly written as two words: 'percussion cap'. Hyphenated forms ('percussion-cap') are seen in historical or adjectival use.
Yes, though it's rare. It can metaphorically describe a small event that triggers a much larger reaction, similar to 'spark' or 'catalyst'.
A small, thin copper or brass cup containing a small amount of shock-sensitive explosive compound, placed on the nipple of a muzzle-loading firearm, which explodes when struck by the hammer to ignite the main powder charge.
Percussion cap is usually specialized/technical (historical, military, firearms) in register.
Percussion cap: in British English it is pronounced /pəˈkʌʃən ˌkæp/, and in American English it is pronounced /pərˈkʌʃən ˌkæp/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this specific term]”
Learning
Memory Aids
Mnemonic
Imagine a tiny metal CAP that you PERCUSS (strike) to make a gun go BANG. Percussion + Cap = Strike-Cap.
Conceptual Metaphor
A SMALL TRIGGER FOR A LARGE EVENT; THE SPARK THAT STARTS THE FIRE.
Practice
Quiz
What is a percussion cap primarily associated with?