a twisting about an axis or fixed point, as of the stem of a plant.

1750–60; alteration of Late Latin intortiōn- (stem of intortiō). See in-2, torsion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
intorsion (ɪnˈtɔːʃən)
botany a spiral twisting in plant stems or other parts

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American Heritage
Medical Dictionary

intorsion in·tor·sion (ĭn-tôr'shən)

  1. The inward rotation of a limb or an organ.

  2. The inward convergent rotation of the upper pole of the vertical meridian of each eye. Also called conclination, negative declination.

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