from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry the simplest
quaternary ammonium cation(CH3)4N+
Sorry, no etymologies found.
Thus, after a good deal of testing and elephantine deliberations among the NASA hierarchy, it has now been decided that two of the 74 vials will be prefilled with a concoction of Eigenbrode's recommendation called tetramethylammonium hydroxide in methanol (TMAH).
The Register 2010