pachycephaly

Noun

pachycephaly (uncountable)

1. Abnormal thickening of the skull, especially that produced by synostosis of the parietal bone with the occipital bone.
   • The terms macro- and microcephalic are, in any case, quite generic, and simply indicate a morphological anomaly, which may include many widely different cases, such, for example, as rickets, hydrocephaly, pachycephaly, etc., all of which have in common the morphological characteristic of...1913, Maria Montessori, Pedagogical Anthropology, page 244
   • Like Chaucer's Miller, David Ritchie, the original of Scott's Black Dwarf, was an example of pachycephaly; i.e., he had the ability to run through doors with his hard skull.1978, Jill Rubenstein, Sir Walter Scott: a reference guide, page 105