脂質

1. Origins, structure, and basic meaning

• Structure: 脂質 is read as ししつ and is a noun for lipids or fat as a nutritional category.
• Basic usage: Physiological function appears in 脂質が果たす役割, while a labeled amount appears in 脂質の量.

2. Common pitfalls and similar expressions

• Lipid and fat
  • Lipid fits scientific classification, while fat is natural on an everyday food label.
• Difference from 脂肪
  • 脂肪 directly denotes fatty tissue or substance; 脂質 centers on lipids as a nutrient or chemical category.