arcuation

plural arcuations

1. countableuncountableThe act of bending or curving; the state of being bent; crookedness.

   In the practice of arcuation, the voussoirs or arch - stones are so cut , that their joints are perpendicular to the arch or to its tangent , at the points where they respectively fall

   1825, Olinthus Gregory, Mathematics for Practical Men

2. countableuncountablebiologyA method of propagating trees by bending branches to the ground and covering the small shoots with earth; layering.

   flowering Shrubs, which are propagated or raised by Arcuation, or laying

   1734, Practical Husbandman and Planter