The SI prefixes above are not the only extreme ones. Others such as xenno (x) (10⁻²⁷) and xenna (X) (10²⁷), or vendeko (v) (10⁻³³) and vendeka (V) (10³³) exist, and can help simplify the expression of extreme numbers.
Source: wiktionary
Xenna-
//ˈzɛnə//
Synonyms for "xenna-" (1 found)
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Closest matches (1)
Prefix(1 words)
Sample sentences
3 total sentences available.
If we try to calculate the mass of earth it comes to 6 xennagrams which is nothing but 6x10²⁴ kilograms or 6x10²⁷ gms.
Source: wiktionary
But that's nothing: our universe is about 0.8 Xm (Xennametres, billions of billions of billions of metres) in diameter.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.