Plural form referring to individuals or organisms with a brachistocephalic skull structure, characterized by a broad, short head shape measured from front to back.
From Greek 'brachistos' (shortest) and 'kephale' (head), with Latin plural ending '-i'. This anthropological term developed in the 19th century when scientists were classifying human skull shapes.
Anthropologists use this term to describe people with rounder, shorter heads, which is just one of many ways human skulls vary naturally across populations—and it's a good reminder that 'normal' head shape is basically whatever shape your ancestors' heads were.
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