Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- prefix nonstandard, rare In
metric systems of units, multiplies theunit to which it is attached by 1027. Symbol: X
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Ancient Greek ἐννέα (ennea, "nine"), for the ninth order of 103, and the letter x, as the third term in a series running backwards through the alphabet. The final a indicates a positive power of ten.
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