小肠 (xiǎo cháng) literally means 'small intestine' — a vital organ in the human digestive system located between the stomach and large intestine. The character 小 (xiǎo) means 'small', while 肠 (cháng) means 'intestine' or 'gut'. Together, they form a compound noun denoting this specific anatomical structure responsible for absorbing nutrients from digested food.

In Chinese, 小肠 is used primarily in medical, biological, and health-related contexts — such as discussing digestion, nutrition, or gastrointestinal disorders. It rarely appears in casual daily speech unless referring to health issues (e.g., '小肠炎' — enteritis) or in educational settings. Unlike English, where 'small intestine' may be shortened informally to 'intestine' in some contexts, 小肠 is never shortened in standard usage; the full term is always required for clarity, since 肠 alone can refer to any intestine (including the large intestine, 大肠).