• adjective
• synonym
• antonym

• periodic acid (noun)
  1. any acid of iodine that contains oxygen
• periodic apnea of the newborn (noun)
  1. irregular breathing of newborns; periods of rapid breathing followed by apnea; believed to be associated with sudden infant death syndrome
• periodic breathing (noun)
  1. abnormal respiration in which periods of shallow and deep breathing alternate
• periodic edema (noun)
  1. recurrent large circumscribed areas of subcutaneous oedema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs
• periodic event (noun)
  1. an event that recurs at intervals
• periodic function (noun)
  1. x x+t mathematics any function whose value repeats after the regular addition of a period to its independent variable; i.e. f = f for some t over all x
• periodic law (noun)
  1. chemistry the principle that chemical properties of the elements are periodic functions of their atomic numbers
• periodic motion (noun)
  1. motion that recurs over and over and the period of time required for each recurrence remains the same
• periodic movement (noun)
  1. motion that recurs over and over and the period of time required for each recurrence remains the same
• periodic sentence (noun)
  1. a complex sentence in which the main clause comes last and is preceded by the subordinate clause
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