fisheye

1) an eye like that of a fish

2) a wide-angle lens on a camera covering about 180°

3) a weld defect having a hole or piece of matter surrounded by a circular area of brightness

4) a diamond or other gem cut too thin for proper brilliance

5) a variety of moonstone

6) an imitation diamond

7) a small blemish in finished paper caused by a crushed and glazed particle

8) a cold or suspicious stare

9) blank, expressionless

10) ocular lymphomatosis in fowl

11) in oil drilling fluids, slang for a globule of partly hydrated polymer formed by poor dispersion during mixing. About 0.2-0.5 inches in size, they consist of a granule of unhydrated polymer covered by hydrated polymer and so are impervious to water and do not disperse