/ Dictionary / Index M monobasic: Meaning and Definition of Find definitions for: mon•o•ba•sic Pronunciation: (mon"u-bā'sik), [key] — adj. (of an acid) containing one replaceable hydrogen atom. monotypic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. monoatomic monobasic potassium phosphate Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language