different between recurvation vs incurvation

English

recurvation (countable and uncountable, plural recurvations)

incurvation (countable and uncountable, plural incurvations)

The act of acquiring or being given a curved form; an instance of curving or bending.
- 1831 David Brewster, Memoirs of the Life of Sir I. Newton (1855) I. vii. 152:
  The incurvation or bending of a ray of light, incident on such a surface.
The state of being curved or bent; any curved shape or formation; curvature; a curve; a bend.
1. A curving inwards; the condition of being curved inwards.
(obsolete) Bowing in reverence or worship.

John A. Simpson and Edward S. C. Weiner, editors (1989) , “incurvation”, in The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, ?ISBN

Send