The condition of having a very broad or short skull; extreme brachycephaly where the skull width is significantly greater than its length.
From Greek brachys 'short' plus kephale 'head' plus -y (forming abstract nouns). The term names a specific anthropometric classification for skull shape.
Brachistocephaly was actually used in early 20th-century attempts to classify racial types—a deeply flawed scientific enterprise that led to harmful pseudoscience, showing how technical terminology can make bad ideas sound legitimate.
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