| 单词 | cranial segment | 
| 释义 | cranial segmentnoun  : any of three annular segments into which the bones of the cranium proper may be grouped:    a    : an occipital segment consisting of the basioccipital, exoccipital, and supraoccipital bones    b    : a parietal segment consisting of the basisphenoid, alisphenoid, and parietal bones    c    : a frontal segment consisting of the presphenoid, orbitosphenoid, and frontal bones   | 
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