convex

US /ˈkɑːn.veks/
UK /ˈkɑːn.veks/
"convex" picture
1.

convexo

having an outline or surface curved like the exterior of a circle or sphere

:
The lens of the magnifying glass is convex.
La lente de la lupa es convexa.
The surface of the mirror was slightly convex.
La superficie del espejo era ligeramente convexa.