1. a steady bright blue light; formerly used as a signal but now a firework;
The Collaborative International Dictionary of English v.0.48:
Bengal \Ben*gal"\, prop. n.
1. A province in India, giving its name to various stuffs,
2. A thin stuff, made of silk and hair, originally brought
3. Striped gingham, originally brought from Bengal; Bengal
Bengal light, a firework containing niter, sulphur, and
antimony, and producing a sustained and vivid colored
light, used in making signals and in pyrotechnics; --
called also blue light.
Bengal stripes, a kind of cotton cloth woven with colored
stripes. See Bengal, 3.
Bengal tiger. (Zool.). See Tiger.
[1913 Webster] Bengalee
WordNet (r) 3.0 (2006):
n 1: a steady bright blue light; formerly used as a signal but
now a firework