minette
noun
mi·nette
mə̇ˈnet
plural -s
1
: a dark igneous rock composed chiefly of biotite and orthoclase that occurs usually in narrow dikes and sheets and that constitutes one of the lamprophyres
2
[French] : an oolitic iron ore containing as a rule 28 to 48 percent of iron and 1.5 to 2 percent of phosphorus that is plentiful in Luxemburg and Lorraine and is adapted for the basic Bessemer process
Word History
Etymology
German, from French, oolitic iron ore, from French mine ore, mine + -ette