Read Edit View history 凹凸 āotū concave-convex Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 凹凸 · āotū · concave-convex 2026/03/04 凹凸 āotū concave-convex having both depressions and protrusions; characterized by bumps and holes 这种拼图利用凹凸的边缘进行咬合。 created sense Mar 4, 2026, 02:25 AM