凹凸

Traditional form:

凹凸

Pinyin (reading):

āotū

Definitions:

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

Characters:

• 凹 - concave, hollow; depressed; pass, valley
• 凸 - to protrude, to bulge out; convex

Traditional characters:

• 凹 - concave, hollow; depressed; pass, valley
• 凸 - to protrude, to bulge out; convex