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The Collaborative International Dictionary
Rupert's drop

Rupert's drop \Ru"pert's drop`\ A kind of glass drop with a long tail, made by dropping melted glass into water. It is remarkable for bursting into fragments when the surface is scratched or the tail broken; -- so called from Prince Rupert, nephew of Charles I., by whom they were first brought to England. Called also Rupert's ball, and glass tear.

Usage examples of "rupert's drop".

A Prince Rupert's drop, no more than a glass artist's novelty, one a child could create.

That and an aching throat and smarting eyes and the picture of himself as a glass bee with a Prince Rupert's Drop tail buzzing through a ripple in a stack of metal sheets miles long, or an enchanted prince sprinting down a poisoned corridor wide as his elbows—.