凹凸性

concavity (math.)

depressed / sunken / indented / concave / female (connector etc)

variant of 窪|洼[wa1] / (used in names)

concave or convex / bumps and holes / uneven (surface) / rugged

to stick out / protruding / convex / male (connector etc) / Taiwan pr. [tu2]

convexity

nature / character / property / quality / attribute / sexuality / sex / gender / suffix forming adjective from verb / suffix forming noun from adjective, corresponding to -ness or -ity / essence / CL:個|个[ge4]