incurved
adjective
[ ɪnˈkəːvd ]
• curved inwards.
• "this side was greatly incurved along its whole length"
Origin:
early 17th century: from incurve + -ed2.
incurve
verb
• curve inwards.
• "the petals have a tendency to incurve"
Origin:
late Middle English: from Latin incurvare, from in- ‘in, towards’ + curvare ‘to curve’.