planoconcave

• Qualifie une lentille ou un miroir qui est plat d'un côté et concave de l'autre.

Describes a lens or mirror that is flat on one side and concave on the other.

1. Flat on one side and concave on the otherC2formalscientific

   Describes a lens or mirror that has one flat surface and one surface that curves inward like a cave.

   plan concave

   • The optician used a planoconcave lens to correct the patient's vision.
   • In the physics lab, we studied how light refracts through a planoconcave lens.
   • The telescope's design incorporated a planoconcave mirror to focus the light.