ultrabasic

adjective

ul·tra·ba·sic ˌəl-trə-ˈbā-sik

: extremely basic

an ultrabasic system

specifically : very low in silica and rich in iron and magnesium minerals

dunite and peridotite are ultrabasic rocks

ultrabasic noun

Examples of ultrabasic in a Sentence

Recent Examples on the Web Rwanda has introduced ultrabasic health insurance for more than 90% of its people; infant mortality has fallen from 120 per 1,000 live births in 2000 to under 30 last year. —

The Economist, 28 Apr. 2018

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