Etymological root
periodos
Ancient Greek
Words from this root(3)
photoperiod
C2+
/ˌfoʊtoʊˈpɪriəd/
the duration of daily light exposure affecting an organism
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periodic
C2+
/ˌpɪriˈɑdɪk/
occurring or recurring at regular intervals
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periodical
C2+
/ˌpɪriˈɑdɪkəl/
a magazine or journal published at regular intervals
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