(of an acid, such as hydrogen chloride) having only one replaceable hydrogen atom per molecule
monobasic in American English
(ˌmɑnəˈbeɪsɪk)
adjective Chemistry
1.
designating an acid the molecule of which contains one hydrogen atom replaceable by a metal or positive radical or capable of reacting with the hydroxyl group
2.
designating a compound in which a metal or positive radical replaces one acid hydrogen atom