The word **秃顶 (tūdǐng)** is formed through **morphological compounding**, combining the character **秃 (tū)**, meaning "bald," with **顶 (dǐng)**, meaning "top" or "crown (of the head)." It is a **modifier-head structure** where "秃" describes the state of the "顶," literally creating the meaning "bald crown," which semantically narrows to specifically denote the condition of male pattern baldness or a bald spot on the top of the head. This formation is typical in Mandarin for creating precise, descriptive nouns for physical attributes or conditions.