# Rupert's drop

> English word · Noun

## Definitions
1. A glass bead created by dripping molten glass into cold water so it solidifies into a tadpole shape with a very tough head but a long fragile tail which, if damaged, causes the bead to disintegrate explosively.

## Etymology
Named after Prince Rupert of the Rhine, nephew of Charles I, who brought them to England in 1660.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/rupert-s-drop