From The Collaborative International Dictionary of English v.0.48 :
Concave \Con"cave\, v. t. [imp. & p. p. concaved; p. pr. & vb. n. Concaving.] To make hollow or concave. [1913 Webster]From The Collaborative International Dictionary of English v.0.48 :
Concaved \Con"caved\, a. (Her.) Bowed in the form of an arch; -- called also arched. [1913 Webster]