The first shaded figure, therefore, represents a concaved surface, and the second figure a convex surface.
This is clearly shown in Fig. 21, where the pipe D ejects the stream of steam against the concaved blades E.
The flukes are broad, concaved on the rear margin, and deeply notched.
concave con·cave (kŏn-kāv', kŏn'kāv')
Curved like the inner surface of a sphere. n.
A concave surface, structure, or line.