Meanings
adjectiveultrabasic (not comparable)
- not comparablegeographyultramafic
In the process of basification, the top layer of the crust becomes basic, while the lower becomes ultrabasic acquiring the density of the mantle or an even greater density
1980, A. W. Bally, Dynamics of Plate Interiors, →ISBN, page 49
Synonyms & antonyms
Also see
Origin
Rhymes & wordplay
Anagrams
Cite this entry
APA
ultrabasic. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/ultrabasic
MLA
“ultrabasic.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ultrabasic. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “ultrabasic,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/ultrabasic.
Source: ultrabasic on Wiktionary, CC BY-SA 4.0.