The term "疯牛病" (fēngniúbìng), meaning "mad cow disease," is a semantically transparent compound word formed through a straightforward modifier-head structure common in Chinese terminology. It is a direct translation-calque of the English term, constructed by combining the morphemes **疯** (fēng, "mad/crazy") as an adjective, **牛** (niú, "cow/cattle") as the nominal subject, and **病** (bìng, "disease/illness") as the core noun. The logic follows the descriptive sequence "[mad] + [cow] + [disease]," efficiently and literally naming the illness by its most salient characteristic (bovine spongiform encephalopathy causing abnormal behavior) and its host. This formation exemplifies how modern Chinese often creates precise, accessible technical vocabulary through analytic compounding.