grisoutiteEtymologyFrom French grisou + -ite.nounA type of safety explosive, made from nitroglycerine mixed with magnesium sulfate and sawdust, that could be used where firedamp was present“1889-90 https://mininginstitute.org.uk/wp-content/uploads/2016/NEIMME%20Vol%2039.pdf It will be seen that all the explosives stemmed with coal-dust, gas being absent, produced flame except grisoutite.”