convex
US /ˈkɑːn.veks/
UK /ˈkɑːn.veks/

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.