Candlebomb
Can´dle`bomb`
| n. | 1. | A small glass bubble, filled with water, which, if placed in the flame of a candle, bursts by expansion of steam. |
| 2. | A pasteboard shell used in signaling. It is filled with a composition which makes a brilliant light when it explodes. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.