/ Dictionary / Index N nanomole: Meaning and Definition of Find definitions for: nan•o•mole Pronunciation: (nan'u-mōl", nā'nu-), [key] — n. Chem. one billionth of a mole. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nanometer nanoplankton Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language