source: periodic function ~ A Maths Dictionary for Kids Quick Reference by Jenny Eather

1. appearing or occurring at intervals: 周期的に現れる、起こる

定期的, 周期的な

e.g. the periodic visits she made to her father.: 彼女の父親に対する定期的な訪問

2. Chemistry relating to the periodic table of the elements or the pattern of chemical properties that underlies it.: 元素の周期的な表、もしくはその根拠をなす科学的な特性のパターンに関連する

periodic law:〘化〙 周期律

3. relating to a rhetorical period.: 修辞的な終止符に関連する

〘修辞〙 完成, 掉尾文の

See period (sense 6 of the noun) .

mid 17th century: from French périodique, or via Latin from Greek periodikos ‘coming round at intervals’, from periodos (see period).