Definition of periodic law in English:

periodic law

Syllabification: pe·ri·od·ic law
Pronunciation: /ˌpi(ə)rēˌädik ˈlô
 
/

noun

Chemistry
A law stating that the elements, when listed in order of their atomic numbers (originally, atomic weights), fall into recurring groups, so that elements with similar properties occur at regular intervals.
More example sentences
  • His discovery of the periodic law in the late 1860s was a remarkable accomplishment.
  • This site provides details about him and his major achievement, with the discovery of periodic law and the table.

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Word of the day grammarian
Pronunciation: grəˈmɛːrɪən
noun
a person who studies and writes about grammar