semidiurnal

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adjective semi·di·ur·nal \-dī-ˈər-nəl\

Definition of semidiurnal

  1. 1 :  relating to or accomplished in half a day

  2. 2 :  occurring twice a day

  3. 3 :  occurring approximately every half day the semidiurnal tides

First Known Use of semidiurnal

1594


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