thermite: meaning, definition, pronunciation and examples

Low
UK/ˈθɜːmaɪt/US/ˈθɜːrmaɪt/

Technical/Specialist

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Quick answer

What does “thermite” mean?

A highly energetic incendiary mixture of a metal powder (commonly aluminium) and a metal oxide (commonly iron oxide), which when ignited produces an exothermic oxidation-reduction reaction, generating intense heat.

Audio

Pronunciation

Definition

Meaning and Definition

A highly energetic incendiary mixture of a metal powder (commonly aluminium) and a metal oxide (commonly iron oxide), which when ignited produces an exothermic oxidation-reduction reaction, generating intense heat.

The reaction, material, or process involving such a mixture, used in welding, incendiary weapons, and controlled demolition, sometimes referred to as the "Goldschmidt process".

Dialectal Variation

British vs American Usage

Differences

No significant spelling or usage differences. The term is identical and used with the same technical meaning in both varieties.

Connotations

Technically neutral but often associated with military, industrial, or destructive applications due to popular media portrayals.

Frequency

Equally low-frequency in both varieties; usage is confined to technical, military, historical, and educational contexts.

Grammar

How to Use “thermite” in a Sentence

VERB + thermite (e.g., ignite, use, mix, produce)thermite + NOUN (e.g., reaction, mixture, welding, grenade, process)

Vocabulary

Collocations

strong
ignite thermitethermite mixturethermite reactionthermite weldingthermite grenade
medium
thermite processaluminium thermiteusing thermiteburning thermitethermite charge
weak
powerful thermitemix thermitehot thermiteproduce thermiteapply thermite

Examples

Examples of “thermite” in a Sentence

verb

British English

  • [No standard verb form. 'Thermite' is not used as a verb.]

American English

  • [No standard verb form. 'Thermite' is not used as a verb.]

adverb

British English

  • [No adverb form derived from 'thermite'.]

American English

  • [No adverb form derived from 'thermite'.]

adjective

British English

  • The thermite welding process is standard for joining railway tracks.
  • They conducted a thermite reaction demonstration in the lab.

American English

  • A thermite grenade can burn through engine blocks.
  • The thermite mixture was prepared under a fume hood.

Usage

Meaning in Context

Business

Rare, unless in specific industries like railway maintenance (thermite welding of tracks) or specialised demolition.

Academic

Used in chemistry, materials science, engineering, and military history contexts.

Everyday

Virtually never used in casual conversation. May be encountered in documentaries, news about industrial accidents, or action films.

Technical

The primary domain. Precise description of compositions, reaction temperatures (~2500°C), and industrial/military applications.

Vocabulary

Synonyms of “thermite”

Strong

thermit (archaic/alternative spelling)thermic composition

Neutral

Goldschmidt process mixtureincendiary mixture

Weak

metal-fuel incendiaryexothermic mixture

Vocabulary

Antonyms of “thermite”

inert substancecoolantfire retardant

Watch out

Common Mistakes When Using “thermite”

  • Misspelling as 'thermate' (a related but different incendiary).
  • Pronouncing the '-mite' as /maɪt/ (like 'mite' insect) is correct, but some may incorrectly use /miːt/.
  • Using as a countable noun (e.g., 'a thermite') – it's generally uncountable (e.g., 'some thermite').

FAQ

Frequently Asked Questions

Yes, because the thermite reaction supplies its own oxygen from the metal oxide; it does not require atmospheric oxygen and can proceed underwater or in other oxygen-poor environments.

No. Thermite is the classic aluminium-iron oxide mixture. Thermate is a variant, often used in incendiary grenades, which typically adds sulphur and barium nitrate to thermite to lower its ignition temperature and produce more flame.

Its main civilian use is in thermite welding (also called exothermic welding) for joining electrical conductors or railway tracks. Historically and militarily, it has been used in incendiary bombs and grenades.

It burns at an extremely high temperature and is a self-contained reaction. Pouring water on it can cause explosive steam generation, potentially spreading the burning material. It must burn out on its own or be smothered with massive amounts of specific dry chemicals or sand.

A highly energetic incendiary mixture of a metal powder (commonly aluminium) and a metal oxide (commonly iron oxide), which when ignited produces an exothermic oxidation-reduction reaction, generating intense heat.

Thermite is usually technical/specialist in register.

Thermite: in British English it is pronounced /ˈθɜːmaɪt/, and in American English it is pronounced /ˈθɜːrmaɪt/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

  • [No common idioms specific to the word. Technical term.]

Learning

Memory Aids

Mnemonic

Think of 'THERM' (related to heat, like in 'thermal') and '-ITE' (a common suffix for minerals/compounds). A compound that creates intense HEAT.

Conceptual Metaphor

LIQUID SUN/UNSTOPPABLE FIRE: Often conceptualised as a substance that melts through anything, representing unstoppable, concentrated destructive or transformative energy.

Practice

Quiz

Fill in the gap
For welding railway tracks, engineers often use the process, which relies on a highly exothermic chemical reaction.
Multiple Choice

What is the primary reaction type in a thermite process?