You searched for: “semidiurnal
semidiurnal (adjective) (not comparable)
1. In astronomy, pertaining to, consisting of, or performed in, half the time between the rising and setting of a celestial body; chiefly in semi-diurnal arc.
2. Occurring every twelve hours; primarily referring to the tides.
3. Pertaining to, or accomplished in, half a day, or twelve hours; occurring twice every day.
4. A reference to, or traversed in, six hours, or in half the time between the rising and setting of a heavenly body; such as, a semidiurnal arc.
This entry is located in the following units: dies, di-, die-, -diem, diurn- (page 2) semi- (page 2)