L

Low resolution

The term applied to a bitmap graphics file (usually a photographic image) that is only used for positional purposes, or 'on-screen' display.
 
The term 'low-resolution' is not an absolute term. A low resolution file is typically 72dpi, at the intended output size and so is generally considered unsuited for printed work as it will probably appear bitmapped or aliased. However, some newspaper or large posters are output at very course line screens and so this size of image is no longer considered 'low-resolution'.

See also: High resolution, for position only, resolution