noun tho·lei·ite \ˈtō-lə-ˌīt, ˈthō-\

Definition of tholeiite

  1. :  a basaltic rock that is rich in aluminum and low in potassium, is found typically in the ocean floor, and is prob. derived from the earth's mantle


play \ˌtō-lə-ˈi-tik, ˌthō-\ adjective

Origin and Etymology of tholeiite

German Tholeiit, from Tholey, village in Saarland, Germany + German -it -ite

First Known Use: 1866

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