Definition

1. Noun:
   • A chemical compound: Urethane is an ester of carbamic acid, a specific type of organic compound with the formula C₃H₇NO₂. It is also known as ethyl carbamate.
   • A material component: In industrial contexts, the term "urethane" is often used as a short form for polyurethane, a class of polymers used in foams, coatings, and adhesives.

Usage Examples

• Noun:
  • The laboratory synthesized a small sample of urethane for testing.
  • The foam mattress is made from a type of urethane.
  • Urethane was once used as a veterinary anesthetic.

Advanced Usage

• Technical/Industrial Context: In materials science and manufacturing, "urethane" frequently appears as part of the term "polyurethane." However, when used alone in such contexts, it typically refers to the family of materials derived from urethane chemistry.
  • The car's paint has a clear urethane topcoat for durability.
  • They installed urethane insulation in the walls.

Variants and Related Words

• Polyurethane (n): A polymer made from a chain of urethane units. It is a common plastic material.
  • Polyurethane foam is used in furniture cushions.
• Carbamate (n): A salt or ester of carbamic acid; urethane is a specific ethyl ester of carbamic acid.
• Ethyl carbamate (n): The systematic chemical name for urethane.

Synonyms

• Ethyl carbamate: The precise chemical name.
• Carbamic acid ethyl ester: A descriptive synonym based on its chemical structure.

Notes on Meaning

• Chemical vs. Common Usage: The primary, specific chemical meaning refers to the compound ethyl carbamate (C₃H₇NO₂). In broader commercial and industrial language, "urethane" is a common shorthand for materials based on polyurethane chemistry. The intended meaning is usually clear from context.

Noun

1. an ester of carbamic acid