The Collaborative International Dictionary
Amphistylic
Amphistylic \Am`phi*sty"lic\, a. [Gr. ? + ? pillar, support.] (Anat.) Having the mandibular arch articulated with the hyoid arch and the cranium, as in the cestraciont sharks; -- said of a skull.
Wiktionary
amphistylic
a. (context anatomy of a skull English) Having the mandibular arch articulated with the hyoid arch and the cranium, as in the cestraciont sharks.