arcuation

noun

1. (countable, uncountable)The 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”

2. (countable, uncountable)A 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”