franklinite

[frangk-li-nahyt]

frank·lin·ite

[frangk-li-nahyt]
noun
a mineral of the spinel group, an oxide of zinc, manganese, and iron, occurring in black octahedral crystals or in masses: formerly mined for zinc.

Origin:
1810–20, Americanism; named after Franklin, New Jersey, where it is found; see -ite1
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Franklinite is always a great word to know.
So is ninnyhammer. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a fool or simpleton; ninny.
Collins
World English Dictionary
franklinite (ˈfræŋklɪˌnaɪt)
 
n
a black mineral consisting of an oxide of iron, manganese, and zinc: a source of iron and zinc. Formula: (Fe,Mn,Zn) (Fe,Mn)2O4
 
[C19: from Franklin, New Jersey, where it is found, + -ite1]

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