Definition

1. Noun:
   • Air in a liquid state: A cryogenic liquid produced by cooling normal atmospheric air to extremely low temperatures, causing its components (primarily nitrogen and oxygen) to condense into a pale blue, mobile fluid.

Usage Examples

• Noun:
  • The laboratory stored the samples in liquid air to preserve them.
  • Handling liquid air requires special protective equipment due to its extreme cold.

Advanced Usage

• Scientific Context: Used as a refrigerant or as a source of individual gases (like nitrogen and oxygen) after fractional distillation.
  • The process begins with the fractional distillation of liquid air.

Variants and Related Words

• Liquid nitrogen (n): The liquid state of nitrogen, a common component separated from liquid air.
• Liquid oxygen (n): The liquid state of oxygen, another primary component separated from liquid air.
• Cryogenic fluid (n): A general term for liquefied gases at very low temperatures, which includes liquid air.

Synonyms

• Liquefied air (n): Air that has been turned into a liquid.

Notes on Meaning

• Important Distinction: "Liquid air" is a specific substance, not a general term. It refers strictly to liquefied atmospheric air. It is not typically used as a countable noun (e.g., "a liquid air" is uncommon).

Noun

1. air in a liquid state