- Magazine - Paper or magazine - Publication issued regularly - Regular publication - Of or pertaining to a period or periods, or to division
by periods. - Performed in a period, or regular revolution;
proceeding in a series of successive circuits; as, the periodical
motion of the planets round the sun. - Happening, by revolution, at a stated time; returning
regularly, after a certain period of time; acting, happening, or
appearing, at fixed intervals; recurring; as, periodical epidemics.