Back then, the lower class, rather than sink meekly into its immiseration, periodically erupted in violent strikes and riots.
I happen to find male melancholy endlessly fascinating (being male, and periodically melancholy), but does everyone?
The IMF and World Bank had periodically shared their fears with New Delhi about the uncontrolled rise in population levels.
Hamas-ruled Gaza became a hostile territory from which missiles were periodically fired into Israel.
The answers ranged from “periodically” to “sometimes” to “all the time.”
Instead of periodically destroying card catalogues, they should be added to and preserved.
This sometimes appears only periodically, and is often relieved by quinine.
This would make four interperiodic groups, and they would come also periodically in the table too.
periodically in our Halls we have had what we call Altar Services.
We are at this moment in the midst of one of those industrial breakdowns that periodically paralyze the life of the nation.
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).
periodic pe·ri·od·ic (pĭr'ē-ŏd'ĭk)
Having or marked by repeated cycles.
Recurring at regular intervals.