Crown-glass meaning

A soda-lime optical glass that is exceptionally hard and clear, with low refraction and low dispersion.
noun
0
0
A form of window glass made by whirling a glass bubble to make a flat circular disk with a lump left in the center by the glass blower's rod.
noun
0
0
Window glass made in flat, circular plates by blowing and whirling, with a small knot in the center left by the blower's rod.
noun
0
0
A very clear optical glass with a low index of refraction.
noun
0
0
Advertisement