That part of an optical system where real or virtual images are formed

Able to be imagined; conceivable

(postpositive) That is beyond memory; ancient. / (positive) Ancient beyond memory.

(mathematics) The vertical line in the complex plane, every point on which corresponds to a complex number having zero real component

The property of not being in balance.

A picture made using lenticular printing where different images appear from different viewing angles.

Any form of information processing whose input and output are both images, such as photographs or frames of video.

The way a person views themself.

(philosophy) The criticism of a philosophy using its own standpoint

like or as an imbecile; so senseless as to be laughable; absurd, foolish, stupid, idiotic.