Definitions for taconiteˈtæk əˌnaɪt
Random House Webster's College Dictionary
an iron-bearing chert mined as low-grade iron ore in the Mesabi Range.
Origin of taconite:
1890–95, Amer.; after the Taconic Range in New York and Massachusetts; see -ite1
a variety of chert containing magnetite and hematite; mined as a low-grade iron ore
a low-grade flint-like iron ore containing 20-30% iron
a proprietary software tool for developing Ajax-enabled Internet applications