thermit: meaning, definition, pronunciation and examples
Low (Technical)Technical / Scientific / Historical
Quick answer
What does “thermit” mean?
A chemical mixture of aluminum powder and a metal oxide (commonly iron oxide), which produces an extremely high-temperature exothermic reaction (aluminothermic reaction) when ignited. Used for welding and incendiary purposes.
Audio
Pronunciation
Definition
Meaning and Definition
A chemical mixture of aluminum powder and a metal oxide (commonly iron oxide), which produces an extremely high-temperature exothermic reaction (aluminothermic reaction) when ignited. Used for welding and incendiary purposes.
The reaction itself or the process of thermit welding; by extension, any highly exothermic mixture used for similar high-temperature applications.
Dialectal Variation
British vs American Usage
Differences
No significant difference in usage, as it is a technical term. The spelling 'thermite' is more prevalent in both varieties.
Connotations
Technical, industrial, military. Associated with welding rails, incendiary weapons (e.g., thermite grenades), and demolition.
Frequency
Extremely low in general discourse. Slightly higher frequency in historical or engineering texts.
Grammar
How to Use “thermit” in a Sentence
Use [thermit] to weld [object]The [thermit] reaction produces [result][Subject] ignited the thermitVocabulary
Collocations
Examples
Examples of “thermit” in a Sentence
verb
British English
- The engineers will thermit-weld the rail joints in situ.
- They thermited the broken shaft to repair it.
American English
- The crew thermit-welded the pipeline sections together.
- We need to thermit the steel components.
adverb
British English
- The metal was joined thermit-style.
- It burned thermit-hot.
American English
- They repaired it thermit-fast.
- The mixture reacted thermit-quick.
adjective
British English
- The thermit reaction is spectacular.
- They used a thermit welding kit.
American English
- The thermit process requires careful preparation.
- A thermit grenade was used in the training exercise.
Usage
Meaning in Context
Business
Rare. Possibly in contexts of industrial welding supply or demolition services.
Academic
Used in chemistry, materials science, and engineering papers describing aluminothermic processes.
Everyday
Virtually never used.
Technical
Primary domain. Used in welding, metallurgy, military engineering, and pyrotechnics.
Watch out
Common Mistakes When Using “thermit”
- Misspelling as 'thermite' (more common) or 'thermate'. Using it as a general term for fire.
- Incorrect pronunciation stressing the second syllable (e.g., /θərˈmaɪt/).
FAQ
Frequently Asked Questions
Yes, 'thermit' is a trademarked name for the same aluminothermic mixture more commonly referred to as 'thermite' in general scientific and technical use.
It is primarily used for welding railway rails, joining heavy copper cables for electrical purposes, and repairing large castings where traditional welding is impractical.
Extremely. The reaction reaches temperatures over 2500°C, produces intense UV light, and cannot be extinguished by conventional means. It should only be handled by trained professionals with proper safety equipment.
No. Water will typically cause a violent steam explosion, spreading the burning material. Specialist techniques involving dry sand or letting it burn out in a controlled manner are required.
A chemical mixture of aluminum powder and a metal oxide (commonly iron oxide), which produces an extremely high-temperature exothermic reaction (aluminothermic reaction) when ignited. Used for welding and incendiary purposes.
Thermit is usually technical / scientific / historical in register.
Thermit: in British English it is pronounced /ˈθɜː.maɪt/, and in American English it is pronounced /ˈθɝː.maɪt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None (technical term)”
Learning
Memory Aids
Mnemonic
Think: 'THERMal lighT' → THERMIT produces intense thermal light and heat.
Conceptual Metaphor
Contained sun / portable furnace.
Practice
Quiz
What is the primary chemical reaction in thermit?