splanchnocranium
noun
splanch·no·cra·ni·um
| \ ˌsplaŋk-nō-ˈkrā-nē-əm
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plural splanchnocraniums
or splanchnocrania\ -nē-ə
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Medical Definition of splanchnocranium
: the portion of the skull that arises from the first three branchial arches and forms the supporting structure of the jaws