Incurvation

in·cur·vate  (n-kûrvt, nkûr-)

tr.v. in·cur·vat·ed, in·cur·vat·ing, in·cur·vates

To cause to bend into an inward curve.

adj.

Curved inward.

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incur·vation n.

in·curva·ture (-v-chr, -chr) n.

Thesaurus

Noun	1.	incurvation - a shape that curves or bends inward concave shape, concavity, incurvature solid - a three-dimensional shape dome - a concave shape whose distinguishing characteristic is that the concavity faces downward fossa, pit - a concavity in a surface (especially an anatomical depression) niche, recess, recession, corner - a small concavity bowl, trough - a concave shape with an open top scoop, pocket - a hollow concave shape made by removing something imprint, impression, depression - a concavity in a surface produced by pressing; "he left the impression of his fingers in the soft mud" cup - any cup-shaped concavity; "bees filled the waxen cups with honey"; "he wore a jock strap with a metal cup"; "the cup of her bra" indentation, indenture - a concave cut into a surface or edge (as in a coastline)
	2.	incurvation - the action of creating a curved shape bending - the act of bending something