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semidiurnal Definition

semi·di·ur·nal (-dī ʉr′nəl)

adjective

  1. of, lasting, or performed in half a day
  2. occurring twice a day, as the tides

semidiurnal Usage Examples

Modifies a noun

  • oscillation: Around the European coastline it is the semidiurnal oscillations the predominate.
  • tide: Spring tides: semidiurnal tides of large range which occur twice a month, when the moon is new or full.