n.
Pronunciation: ' t ō -l ə - ˌ ī t, ' th ō -
Function: noun
Etymology: German Tholeiit, from Tholey, village in Saarland, Germany + German -it -ite
Date: 1866
: 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
– tho · lei · it · ic \ ˌ t ō -l ə - ' i-tik, ˌ th ō - \ adjective