noun
periodical; periodical publication
A formal term for any publication issued at regular intervals, such as magazines, journals, or newspapers.
この図書館は多くの定期刊行物を所蔵している。
This library holds many periodicals.
Compound of 定期 (ていき, 'fixed period') + 刊行 (かんこう, 'publication') + 物 (ぶつ, 'thing').