/ Dictionary / Index A Avogadro's number: Meaning and Definition of Find definitions for: A'voga'dro's num'ber Pronunciation: [key] — Chem. Chem. the constant, 6.02 × 10, representing the number of atoms in a gram atom or the number of molecules in a gram molecule. Symbol: N Also calledCf. Loschmidt's number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Avogadro's law avoid Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language