fisheye lens: Meaning and Definition of

fish'eye lens"

Pronunciation: [key]
— Photog. Photog.
  1. a hemispherical plano-convex lens for photographing in a full 180° in all directions in front of the camera, creating a circular image having an increasing amount of distortion from the center to the periphery.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.