尿素

1. Origins, structure, and basic meaning

• Structure: Written 尿素 and read にょうそ, it is a nitrogen-containing compound found in metabolism and used in products such as fertilizer.
• Basic usage: It is dissolved in water during an experiment and listed by content on a fertilizer bag.

2. Common pitfalls and similar expressions

• Chemical compound rather than urine
  • Despite its name, it identifies one substance, not urine as a whole.