The plural form of craninium, referring to multiple skull structures or the part of the skull containing the brain.
Latin plural of 'craninium,' derived from Greek 'kranion' (skull). The -ia ending marks it as a Latin plural form.
This word is so specialized that it's almost extinct from medical textbooks, replaced by 'crania' and 'skulls,' but it shows how medical terminology constantly evolves even within its own language traditions.
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