Peter,
you're absolutely correct, the meanings of many photographic terms have become ambiguous over the years. A "wide angle" lens has a wider
angle of view when compared to a normal lens. A normal lens is defined as a lens with a focal length equal to the film, or sensor, diagonal. That's about 43mm for 35mm cameras, 28mm for APS sized digicams or 300mm for an 8x10. The normal angle of view is about 53 degrees. On the 8x10 format a 10" lens has a slightly wider angle of view, something like a 24mm focal length on the APS format.
Dan
250mm wide angle? These terms must have changed their meanings since.