from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Non-valent, having valency zero: taking no arguments.
from The Century Dictionary and Cyclopedia
- In chem., having zero valence, as argon, helium, and the other newly discovered gases of the atmosphere, which appear to be incapable of entering into chemical combination with one another or with any of the elements.
Sorry, no etymologies found.