Answer: concave

AnswerCrossword Clue
CONCAVE

Like band shells

CONCAVE

Like some lenses

CONCAVE

Curving inward

CONCAVE
Curved and hollow
CONCAVE
Inward-curving
CONCAVEShaped like the inside of a sphere
CONCAVEHollow and curved.
CONCAVEHollowed.
CONCAVEIncurved.
CONCAVERounded inward.
CONCAVELike the inside of a bowl
CONCAVELens shape
CONCAVELike a bowl
CONCAVEThe vault of the sky
CONCAVELike part of a circle
CONCAVELike the inside of a sphere
CONCAVEHollowed out and curved