乳房

1. Origins, structure, and basic meaning

• Structure: 乳房 is read as ちぶさ and is a human breast or the mammary organ of an animal, including an udder.
• Basic usage: Use 乳房の模型 for a model of an udder or breast and 母牛の乳房に鼻を寄せる for a calf bringing its nose to its mother's udder.

2. Common pitfalls and similar expressions

• Distinction between 乳房 and 胸
  • The headword specifically denotes the mammary organ, while the comparison term more broadly refers to the chest or breast area.