/ Dictionary / Index N nepho-: Meaning and Definition of Find definitions for: nepho- Pronunciation: [key] a combining form meaning “cloud,” used in the formation of compound words: nephometer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nephew nephometer Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language