per-capita

The term "per capita" is a direct borrowing from Latin, where it literally means "by heads." It originates from the practice of counting or distributing resources by the number of individuals, or "heads," in a population. The Latin 'caput' (head) is itself derived from the Proto-Indo-European root kaput-, also meaning "head." Over time, the phrase was adopted into English as a statistical and economic term, retaining its original distributive logic but applying it to abstract averages and calculations. Thus, the concrete act of counting heads evolved into the modern concept of a per-person measurement.

Structure: per (through, by) + capita (head) - per: A Latin preposition meaning "through, by, by means of." - capita: The plural ablative form of the Latin noun 'caput,' meaning "head."