crown glass definition

  • noun:
    • A soda-lime optical glass that's remarkably hard and obvious, with low refraction and reduced dispersion.
    • a kind of screen glass made by whirling a glass bubble to produce a set circular disk with a lump remaining inside center by the glass blower's rod.
    • See under Glass.
    • a number of cup, utilized for making the best possible plate or window cup, and consisting really of silicate of soda or potash and lime, with no admixture of lead; the convex half of an achromatic lens comprises crown-glass; -- so named from a crownlike form trained with undergoing blowing.
    • a beneficial top-notch common blown window-glass.
    • a glass blown into a globe that will be later flattened and spun to make a disk
    • optical cup of reduced dispersion and reasonable refractive index

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  • Definition for "crown glass"
    • A soda-lime optical glass that's remarkably hard and…
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