incurvate
Concise Oxford English Dictionary © 2008 Oxford University Press:
incurvate
▶verb /ˈɪnkəːveɪt/ (usu. as adj. incurvated) curve inwards. ▶adjective /ɪnˈkəːvət/ curved inwards.
– derivatives
incurvation noun.
incurvation noun.
– origin ME: from L. incurvat-, incurvare ‘bend into a curve’.
'incurvate' also found in these Oxford entries:

