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periodical

[peer-ee-od-i-kuh l]
noun
  1. a magazine or other journal that is issued at regularly recurring intervals.
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adjective
  1. published at regularly recurring intervals.
  2. of or relating to such publications.
  3. periodic1.
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Origin of periodical

First recorded in 1595–1605; periodic1 + -al1
Related formspe·ri·od·i·cal·ism, nounpe·ri·od·i·cal·ist, nounpe·ri·od·i·cal·ness, nounnon·pe·ri·od·i·cal, adjective, nounnon·pe·ri·od·i·cal·ly, adverbun·pe·ri·od·i·cal, adjectiveun·pe·ri·od·i·cal·ly, adverb
Can be confusedperiodic periodical
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for nonperiodical

periodical

noun
  1. a publication issued at regular intervals, usually monthly or weekly
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adjective
  1. of or relating to such publications
  2. published at regular intervals
  3. periodic or occasional
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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 nonperiodical

periodical

adj.

c.1600, from periodic + -al (1). As a noun meaning "magazine published at regular intervals," attested from 1798. Related: Periodically.

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Online Etymology Dictionary, © 2010 Douglas Harper