Webster's 1828 Dictionary
INTORSION
n.[L. intorqueo, intorsum, to twist. ] A winding, bending or twisting. In botany, the bending or twining of any part of a plant towards one side or the other, or in any direction from the vertical.
Webster's 1913 Dictionary
INTORSION
In *tor "sion, n. Etym: [L. intortio a curling, crisping: cf. F.intorsion. See Intort, and cf. Intortion. ]
1. A winding, bending, or twisting.
2. (Bot. )
Defn: The bending or twining of any part of a plant toward one side or the other, or in any direction from the vertical.
The Wordsmith Dictionary