Incurvation

n.	1.
	1.	The act of bending, or curving.
	2.	The state of being bent or curved; curvature. An incurvation of the rays. - Derham.
	3.	The act of bowing, or bending the body, in respect or reverence.

Noun	1.	incurvation - a shape that curves or bends inward Synonyms: concave shape, concavity, incurvature
	2.	incurvation - the action of creating a curved shape

bowl, concave shape, concavity, corner, cup, depression, dome, fossa, impression, imprint, incurvate, incurvature, indentation, indenture, niche, pit, pocket, recess, recession, scoop, solid, trough