ˈspreŋgəl-, ˈshpreŋəl- noun
Usage: usually capitalized S
Etymology: after Herman J. P. Sprengel died 1906 British chemist born in Germany
: any of numerous high explosives formed by mixing just before use an oxidizing agent (as nitric acid or potassium chlorate) and a combustible ingredient (as nitrobenzene) neither of which by itself is explosive