凸型

1. Origins, structure, and basic meaning

• Structure: In 凸型 (とつがた), convex mark 凸 and shape 型 combine to denote a convex form.
• Basic usage: 凸型 denotes a convex form or a shape resembling the character 凸, with the center projecting outward.

2. Common pitfalls and similar expressions

• Convex or 凸-shaped form
  • 凸型の modifies an object of that shape and does not cover every minor surface irregularity.