periodic law

[ peer-ee-od-ik, peer- ]
/ ˈpɪər iˈɒd ɪk, ˌpɪər- /

noun Chemistry.

the law that the properties of the elements are periodic functions of their atomic numbers.
Also called Mendeleev's law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights.

Origin of periodic law

First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for periodic law

periodic law
/ (ˌpɪərɪˈɒdɪk) /

noun

Also called: Mendeleev's law the principle that the chemical properties of the elements are periodic functions of their atomic weights or, more accurately, of their atomic numbers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for periodic law

periodic law

n.

The principle that properties of elements recur periodically as atomic numbers increase.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.