History of the star: A triple star, 2.6, 13, and 9, pale yellow, blue, and violet, on the Lion's rump, near the tail of Leo.

Zosma and Zozma is a Persian word meaning "the Girdle", "Enzonement" or "Loincloth".

The Arabic name is Al Thahr al Asad, "the Lion's Back", which has become Duhr and Dhur of modern catalogues.

This star along with the star theta (Coxa), were Arabic Al Kihil al Asad, the "Space between the Shoulders" of the Lion, and Al H-aratan, sometimes transcribed Chortan, and translated the "Two Little Ribs", or the two Khurt, or "Holes", penetrating into the interior of the Lion.

Delta (this star Zosma) and theta (Coxa), on the hind quarter of Leo, constituted the Arabic 9th manzil, Al Zubrah, "the Mane" (though nowhere near the Mane of our present Lion figure), and this star, delta, itself bears this name as Zubra; Al Biruni saying that "when they rise Suhail (Canopus) is seen in Al Izak," — wherever this may be.

In India they marked the 9th nakshatra, Purva Phalguni refers to "The Lucky One," Phalguni literally means "fruit" (1).

On the Euphrates they were Kakkab Kua, the constellation of the god Kua, the "Oracle".

In Egypt, Mes-su, the "Heart of Su":

In Sogdiana they were "Wadha, the Wise":

In Khorasmia, Armagh, the "Great".  

These stars are said to give the ability to prophesy [which could relate to the symbolism of the book-carrying lion in his prophetic role].

[Star Names, Their Lore and Meaning, Richard Hinchley Allen, 1889]. 

Robson (Fixed Stars and Constellations in Astrology) says the "The Former Bad One", symbol is a Bed or Couch. 

Influences of 9th Arabic manzil, Al Zubrah: Good for voyages, gain by merchandise, redemption of captives. (Robson*).

The astrological influences of the constellation: The Lion is associated with the Hebrew letter Kaph and the 11th Tarot Trump "Strength". (Robson*).

The astrological influences of the constellation given by Manilius:

"Who can doubt the nature of the monstrous Lion, and the pursuits he prescribes for those born beneath his sign? The lion ever devises fresh fights and fresh warfare on animals, and lives on spoil and pillaging of flocks. The sons of the Lion are filled with the urge to adorn their proud portals with pelts and to hang up on their walls the captured prey, to bring the peace of terror to the woods, and to live upon plunder. There are those whose like bent is not checked by the city-gates, but they swagger about in the heart of the capital with droves of beasts ; they display mangled limbs at the shop-front, slaughter to meet the demands of luxury, and count it gain to kill. Their temper is equally prone to fitful wrath and ready withdrawal, and guileless are the sentiments of their honest hearts" [Manilius, Astronomica, 1st century AD, p.237.]

Its reputation is that of giving an alert mind, but also inclination to melancholic moods. Conjunct with so called 'malefics', danger by poison and disease of the intestinal tract are indicated. These interpretations have to be considered with utmost caution and restraint. (Ebertin). 

Fixed Stars and Constellations in Astrology