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an imaginary line around which the mandibular condyles may rotate during opening and closing movements. Compare: fulcrum line.
Farlex Partner Medical Dictionary © Farlex 2012
o·pen·ing ax·is(ōpĕn-ing aksis)
Imaginary line around which mandibular condyles may rotate during opening and closing.
Medical Dictionary for the Dental Professions © Farlex 2012