ul·​tra·​ba·​sic ˌəl-trə-ˈbā-sik How to pronounce ultrabasic (audio)
: 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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultrabasic.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1881, in the meaning defined above

Time Traveler
The first known use of ultrabasic was in 1881

Dictionary Entries Near ultrabasic

Cite this Entry

“Ultrabasic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrabasic. Accessed 15 Apr. 2024.

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