乳糖

1. Origins, structure, and basic meaning

• Structure: 乳糖 is read にゅうとう and is a noun for lactose, the sugar found in milk.
• Basic usage: It is used when checking food ingredients or discussing a molecular model in a science context.

2. Common pitfalls and similar expressions

• Scope of the term
  • It does not mean sugar in general; it denotes a specific substance in food or scientific contexts.