carbamide

Thân thiện

A farmer spreads carbamide as fertilizer on his field.

Definition

Noun: 1. A chemical compound (CO(NH₂)₂) that is the main nitrogenous breakdown product of protein metabolism in mammals and the chief solid component of their urine. It is produced synthetically on a large scale from ammonia and carbon dioxide. * Scientific Context: In biochemistry and physiology, 'carbamide' refers specifically to this organic compound, which is excreted by the kidneys. * Industrial/Agricultural Context: The term denotes the synthetic form of this compound, valued for its high nitrogen content and versatility.

Usage Examples

• Scientific/Medical:
  • The laboratory test measured the level of carbamide in the blood sample.
  • In mammals, carbamide is formed in the liver from ammonia.
• Industrial/Agricultural:
  • The factory produces carbamide for use as a nitrogen-rich fertilizer.
  • Synthetic carbamide is a key ingredient in some types of animal feed supplements.

Advanced Usage

• Technical Terminology: 'Carbamide' is the formal, systematic chemical name. In most non-scientific contexts (e.g., agriculture, medicine), the compound is almost universally referred to by its common name, urea.
  • While 'carbamide' is the IUPAC name, the term 'urea' is far more common in clinical and agricultural settings.

Variants and Related Words

• Urea (n): The common, nearly synonymous name for carbamide. This is the term most frequently used in medicine (e.g., blood urea nitrogen test), agriculture, and industry.
• Carbamide Peroxide (n): A chemical complex of carbamide and hydrogen peroxide, used in dentistry and as a bleaching agent.

Synonyms

• Urea: The primary and most widely used synonym.
• Carbonyl diamide: A less common systematic name.

Notes on Different Meanings

The word 'carbamide' has only one core meaning, referring to the specific chemical compound CO(NH₂)₂. Any variation in usage relates to the context in which the compound is discussed (e.g., as a metabolic waste product, a fertilizer, or a chemical feedstock), not to a different meaning of the word itself.

Học thuật

Noun

1. the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics

Từ đồng nghĩa

• urea