| ̷ ̷(ˌ) ̷ ̷ at semi- + adjective
Etymology: semi- + diurnal
1. : relating to or accomplished in half a day
2. : occurring twice a day
3. : occurring approximately every half day
the semidiurnal tides
| ̷ ̷(ˌ) ̷ ̷ at semi- + adjective
Etymology: semi- + diurnal
1. : relating to or accomplished in half a day
2. : occurring twice a day
3. : occurring approximately every half day
the semidiurnal tides
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012