lactose

/'læktous/

Thân thiện

Lactose is the natural sugar found in a glass of milk.

Definition

1. Noun:
   • A type of sugar found in milk: Lactose is a disaccharide sugar composed of one molecule of glucose and one molecule of galactose. It is naturally present in the milk of mammals.
   • A nutritional component: It serves as a primary source of energy for infants and young mammals.

Examples of Usage

• Noun:
  • Lactose is broken down in the small intestine by the enzyme lactase.
  • Some people have difficulty digesting lactose, a condition known as lactose intolerance.
  • Yogurt contains less lactose than milk due to the fermentation process.

Advanced Usage

• "Lactose-free": A term used to describe products from which lactose has been removed or broken down.
  • She buys lactose-free milk because she is intolerant.
• Technical/Biochemical Context: Refers to the specific chemical compound C₁₂H₂₂O₁₁.
  • The hydrolysis of lactose yields glucose and galactose.

Variants and Related Words

• Lactase (noun): The enzyme required to digest lactose.
  • Lactase deficiency is the cause of lactose intolerance.
• Lactic (adjective): Relating to or derived from milk.
  • Lactic acid is produced when lactose is fermented.

Synonyms

• Milk sugar: A common synonym for lactose, emphasizing its source.

Related Phrases and Compounds

• Lactose intolerance (noun phrase): The inability to digest lactose properly.
  • Symptoms of lactose intolerance include bloating and diarrhea.
• Lactose malabsorption (noun phrase): The impaired absorption of lactose in the intestine.

Học thuật

Noun

1. a sugar comprising one glucose molecule linked to a galactose molecule; occurs only in milk
   • cow's milk contains about 4.7% lactose

Từ đồng nghĩa

• milk sugar