from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. Same as detonating bulb (which see, under detonating).
Sorry, no etymologies found.
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