thermit

A worker uses thermit to weld a section of railroad track.

Definition

1. Noun:
   • A mixture of metal powders: "thermit" (also spelled "thermite") is a pyrotechnic composition of metal powder (typically aluminum) and a metal oxide (usually iron oxide) that produces an extremely high temperature when ignited, used in welding and incendiary devices.
   • A welding agent: In industrial contexts, "thermit" refers to the substance used in thermit welding, a process for joining metals (e.g., railway rails) by generating molten iron from the reaction.

Usage Examples

• Noun:
  • The engineers used thermit to weld the railway tracks together. (The mixture was applied to create a strong joint through intense heat.)
  • Thermit is known for its ability to produce temperatures over 2,500 degrees Celsius. (The compound's chemical reaction generates extreme heat.)

Advanced Usage

• "thermit reaction": the exothermic chemical process where aluminum reduces a metal oxide to produce molten metal and aluminum oxide.

  • The thermit reaction is highly exothermic, releasing enough heat to melt steel. (The reaction's energy output is sufficient for industrial welding.)

• "thermit bomb": an incendiary device using thermit to cause fires or destruction.

  • During the war, thermit bombs were used to target industrial facilities. (Incendiary weapons relying on thermit's heat.)

Variants and Related Words

• Thermite (n): an alternate spelling of "thermit," more common in modern usage.

  • Thermite is a staple in pyrotechnics and demolition. (The spelling variant is widely accepted.)

• Thermitic (adj): relating to or characteristic of thermit.

  • The thermitic mixture ignited with a brilliant white flame. (Describing the substance's properties.)

Synonyms

• Pyrotechnic mixture: a general term for compounds used in fireworks or incendiary devices.
• Welding compound: a substance designed for joining metals through heat.

Related Idioms

• "Like thermit": used metaphorically to describe something that burns intensely or rapidly.
  • The rumor spread through the office like thermit. (The news spread extremely quickly and with great impact.)