concave

Mr Wangchuk studied mechanical engineering after a relative noticed his experiments with concave mirrors to brighten dark buildings and cook food.

“My chest was concave trying to pull in breath.”

An actor playing an ancient Greek priestess holds a silver torch containing highly combustible materials over a concave mirror.

It was a little bit concave, like a bowl.

The team synthesized concave, umbrella-like metal complexes that could shield the rotor molecule from unwanted interactions with other molecules in the crystal.