non-periodical

noun

1. a magazine or other journal that is issued at regularly recurring intervals.

adjective

2. published at regularly recurring intervals.
3. of or relating to such publications.
4. periodic1.

noun

1. a publication issued at regular intervals, usually monthly or weekly

adjective

2. of or relating to such publications
3. published at regular intervals
4. periodic or occasional

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