From WordNet (r) 2.0 (August 2003) [wn]:
wide-angle
adj : of or relating to a fisheye lens [syn: fisheye]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Wide-angle \Wide"-an`gle\, a. (Photog. & Optics)
Having or covering an angle wider than the ordinary; --
applied to certain lenses of relatively short focus. Lenses
for ordinary purposes have an angle of 50[deg] or less.
Wide-angle lenses may cover as much as 100[deg] and are
useful for photographing at short range, but the pictures
appear distorted.
[Webster 1913 Suppl.]
[1913 Webster]