concave

US /ˈkɑːn.keɪv/
UK /ˈkɑːn.keɪv/
"concave" picture
1.

cekung

having an outline or surface that curves inward like the interior of a circle or sphere

:
The spoon has a concave shape.
Sendok itu memiliki bentuk cekung.
The lens of the telescope is concave.
Lensa teleskop itu cekung.