Definition

1. Noun:
   • A white crystalline oxide used in the production of calcium hydroxide: A chemical compound with the formula CaO, commonly known as quicklime or burnt lime. It is produced by heating calcium carbonate (e.g., limestone) to high temperatures in a process called calcination.

Usage Examples

• Noun:
  • Calcium oxide is a key ingredient in cement manufacturing.
  • When water is added to calcium oxide, it produces heat and calcium hydroxide.

Advanced Usage

• Technical/Industrial Context: The term is primarily used in scientific, industrial, and construction contexts.
  • The purity of the calcium oxide affects the quality of the steel produced.

Variants and Related Words

• Quicklime: A common name for calcium oxide.
• Burnt lime: Another synonym for calcium oxide.
• Calcium hydroxide (Ca(OH)₂): The compound produced when calcium oxide reacts with water, known as slaked lime.

Synonyms

• Quicklime
• Burnt lime
• Lime (Note: In casual contexts, "lime" can be ambiguous as it may also refer to calcium hydroxide or the fruit.)

Related Phrases/Compounds

• Calcium carbonate (CaCO₃): The raw material (e.g., limestone) from which calcium oxide is produced.
• Slaked lime: Common name for calcium hydroxide, the product of calcium oxide's reaction with water.

Noun

1. a white crystalline oxide used in the production of calcium hydroxide