Akademik

epistropheus
SYN: axis (5). [G. the pivot]

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ep·i·stro·phe·us .ep-ə-'strō-fē-əs n AXIS (2a)

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epi·stro·phe·us (ep″ĭ-stroґfe-əs) [Gr. “the pivot”] axis (def. 3).

Medical dictionary. 2011.