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semidiurnal - Meaning and Examples

Meaning of 'semidiurnal' (Webster Dictionary)

1 . Semidiurnal [ a.]
- Pertaining to, or accomplished in, half a day, or twelve hours; occurring twice every day.
- Pertaining to, or traversed in, six hours, or in half the time between the rising and setting of a heavenly body; as, a semidiurnal arc.