Debility- A planet in detriment or fall.
Decan- 10 degree increments of each sign that signify a co-ruler for the signs triplicity.
Detriment-Planet placed in opposite sign of it’s dignity.
Dignity -The sign that a planet rules naturally is its sign of dignity.
Dipositor- The planet that rules the sign another planet occupies.
Diurnal signs - Represents the southern hemisphere signs,Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces