diurnal arc
noun Astronomy.
the portion of the diurnal circle that is above the horizon at a given point.
Compare
nocturnal arc.
Words nearby diurnal arc
diu,
diuresis,
diuretic,
diuril,
diurnal,
diurnal arc,
diurnal circle,
diurnal motion,
diurnal parallax,
diuron,
div