splanchnocranium
noun
splanch·no·cra·ni·um
ˌsplaŋk-nō-ˈkrā-nē-əm 
plural splanchnocraniums or splanchnocrania
-nē-ə
: the portion of the skull that arises from the first three branchial arches and forms the supporting structure of the jaws
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“Splanchnocranium.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/splanchnocranium. Accessed 23 Apr. 2024.
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