/ Dictionary / Index A Avogadro: Meaning and Definition of Find definitions for: A•vo•ga•dro Pronunciation: (ä"vu-gä'drōIt.ä"vô-gä'drô), [key] 1776–1856, Italian physicist and chemist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: avogadro (Thesaurus) avodire Avogadro's law Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language