Answer: periodic

AnswerCrossword Clue
PERIODICCyclical
periodicAppearing or occurring at intervals
periodicOf or relating to a rhetorical period
periodicrecurring at regular intervals
periodicRelating to the periodic table of the elements or the pattern of chemical properties that underlies it
PERIODICTable in chemistry class
PERIODICTable for chemists?
PERIODICLike Mendeleev's table
PERIODICLike a planetary orbit
PERIODICKind of table
PERIODICRegular
PERIODICFrom time to time.
PERIODICIntermittent.
PERIODICRecurrent.
PERIODIC... table (chemistry class topic)
PERIODICIntermittent
PERIODICKind of table in chemistry class
PERIODICLike magazine mailings
PERIODICOn a regular basis