pe.ri.od.i.cal
adj.(形容词)Periodic.周期性的
Published at regular intervals of more than one day.期刊:以长于一天的固定间歇出版的Of or relating to a publication issued at such intervals.期刊:属于或关于一种以这种周期出版的n.(名词)A publication issued at regular intervals of more than one day.期刊:以多于一天的周期定期出版的出版物