from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Periodic.
- adj. Published at regular intervals of more than one day.
- adj. Of or relating to a publication issued at such intervals.
- n. A publication issued at regular intervals of more than one day.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A publication issued regularly, but less frequently than daily
- n. A publication that appears at fixed intervals
- n. Often contains the most current information in the field, on every conceivable topic, often in greater detail than other publication formats.
- n. The primary means for communication of original scholarship or creative work at the cutting edge of research in almost all fields.
- adj. Periodic
- adj. Published at regular intervals of more than one day, especially weekly, monthly, or quarterly
- adj. Of, or relating to such a publication
from the GNU version of the Collaborative International Dictionary of English
- n. A magazine or other publication which appears at stated or regular intervals.
from The Century Dictionary and Cyclopedia
- Having a period; performed in a fixed period or cycle; appearing, occurring, or happening at stated intervals; regularly or statedly recurring at the end of a fixed period of time: as, periodical diseases; periodical publications.
- Of or pertaining to magazines, newspapers, or other publications which appear or are published at regularly recurring intervals.
- n. A publication issued at regular intervals in successive numbers or parts, each of which (properly) contains matter on a variety of topics, and no one of which is contemplated as forming a book by itself.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. happening or recurring at regular intervals
- n. a publication that appears at fixed intervals
periodic + -al. (Wiktionary)