凸凹

tū'āo

convex-concave

Wiktionary

Entry Composition

1 凸 tū
  1. to stick out; protruding; convex; male (connector etc)
  2. Taiwan pr. tú
=2 凹 āo concave; depressed; sunken; indented; female (connector etc)
=2 凹 wā
  1. variant of 洼 wā
  2. (used in names)