/ Dictionary / Index N nephron: Meaning and Definition of Find definitions for: neph•ron Pronunciation: (nef'ron), [key] — n. Anat., Zool. the filtering and excretory unit of the kidney, consisting of the glomerulus and tubules. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nephron (Thesaurus) nephrology nephropathy Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language