hyobranchium
noun
hyo·bran·chi·um
| \ ˌhīōˈbraŋkēəm\
plural hyobranchia\ -ēə \
Definition of hyobranchium
: a typically somewhat Y-shaped bone that serves to support the tongue and tongue muscles in a snake and is considered to result from fusion of the hyoid and remnants of the branchial arches
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