Bend inwards.

Roget 245: be curved, etc. adj.; curve, sweep, sway, swag, sag; deviate etc. 279; curl, turn; reenter.    render curved etc. adj.; flex, bend, curve, incurvate^†; inflect; deflect, scatter [Phys.]; refract (light) 420; crook; turn, round, arch, arcuate, arch over, concamerate^†; bow, curl, recurve, frizzle.    rotundity etc. 249; convexity etc. 250.    ... show more

Cause to curve inward.

Bent into or having an inward curve.

synonym: incurved.