ul·tra·ba·sic
| \ ˌəl-trə-ˈbā-sik
\
\
Definition of ultrabasic
: extremely basic
an ultrabasic system
specifically
: very low in silica and rich in iron and magnesium minerals
dunite and peridotite are ultrabasic rocks
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“Ultrabasic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrabasic. Accessed 8 Aug. 2022.
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Time Traveler for ultrabasic
The first known use of ultrabasic was in 1881
See more words from the same year