Rupellary

Ru´pel`la`ry


n.1.Rocky.
2.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.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.