/ Thesaurus / P Synonyms of periodic law Find synonyms for: Noun1. periodic law, Mendeleev's law, law, law of natureusage: (chemistry) the principle that chemical properties of the elements are periodic functions of their atomic numbersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language