A small mass of hair located in the stomach or intestine of an animal, such as a cat, resulting from an accumulation of small amounts of hair that are swallowed each time the animal licks its coat.

• 毛团存在于动物（如猫等）的胃或肠中的一团毛发，这是由于动物每次舔毛时吞下的少量毛发积聚而成