Ayanāṃśa

Ayanamsa (ayanāṃśa: from Sanskrit ayana'movement' and aṃśa'component'), also ayanabhāga (from Sanskrit bhāga'portion'), is the Sanskrit term for many systems used in Hindu astrology to account for the precession of equinoxes. There are also systems of ayanamsa used in Western sidereal astrology, such as the Fagan/Bradley Ayanamsa.