from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families
- n. any organic derivative of these compounds
- n. the bound pair of a particle and its antiparticle
from The Century Dictionary and Cyclopedia
- n. In chem., a termination given to the names of compound radicals which are analogous in structure and chemical function to ammonium, NH4, as phosphonium, PH4, or tetramethylphosphonium, P (CH3)4.
Sorry, no etymologies found.