periodic

1
[peer-ee-od-ik]

adjective


Origin of periodic

1
1635–45; < Latin periodicus < Greek periodikós. See period, -ic
Related formspe·ri·od·i·cal·ly, adverbqua·si-pe·ri·od·i·cal·ly, adverb
Can be confusedperiodic periodical

periodic

2
[pur-ahy-od-ik]

adjective Chemistry.

of or derived from a periodic acid.

Origin of periodic

2
First recorded in 1830–40; per- + iodic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


Examples from the Web for periodic

Contemporary Examples of periodic

Historical Examples of periodic

  • The periodic or compensating errors of the planets is another instance.

    Essays, First Series

    Ralph Waldo Emerson

  • But what was his surprise to observe that these alterations were not of an annually periodic character.

  • The periodic time of the moon is the interval required for one circuit of its orbit.

  • His hopes for the best had been but periodic interruptions to a chronic fear of the worst.

  • Juno was to at once begin her first contribution to periodic literature.


British Dictionary definitions for periodic

periodic

adjective

happening or recurring at intervals; intermittent
of, relating to, or resembling a period
having or occurring in repeated periods or cycles
Derived Formsperiodically, adverbperiodicity (ˌpɪərɪəˈdɪsɪtɪ), noun
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

Word Origin and History for periodic
adj.

1640s, from French périodique (14c.), from Latin periodicus, from periodus (see period).

Periodic table in chemistry (1889) is from notion of the arrangement, in which similar properties recur at intervals in elements in the same area as you read down the rows of the table. This sense of the word is attested from 1872 (periodic law).

Online Etymology Dictionary, © 2010 Douglas Harper

periodic in Medicine

periodic

[pîr′ē-ŏdĭk]

adj.

Having or marked by repeated cycles.
Recurring at regular intervals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.