1. Conjugate rotation of the upper poles of each cornea outward. SYN: excyclotorsion. 2. Outward rotation of a limb or of an organ. [L. extorsio, fr. ex- torqueo, to twist out]
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ex·tor·sion ek-'stȯr-shən, 'ek-. n outward rotation (as of a body part) about an axis or fixed point compare INTORSION
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ex·tor·sion (ek-storґshən) [ex- + torsion] outward rotation of the upper pole of the vertical meridian of each eye; called also disclination. Cf. intorsion.Medical dictionary. 2011.