Semi-Arc Houses

Semi-arc houses:
A star rises in the east and arches up across the sky, reaching its highest altitude as it passes over the North/South Meridian, where it is said to culminate.

Semi-Arc Houses. See "Placidus Houses."
Semi-decile. A planetary aspect between two planets or bodies that are 18 degrees apart. Sometimes called a vigintile.
Semi-quartile. See "Semi-square." ...

See also: Horizon, Equator, Houses, Part, Meridian