The Collaborative International Dictionary
Decani \De*ca"ni\, a. [L., lit., of the dean.] Used of the side of the choir on which the dean's stall is placed; decanal; -- correlative to cantoris; as, the decanal, or decani, side.
Wiktionary
a. Of the side of the choir on which the dean's stall is placed; decanal.
Wikipedia
Decani ( Latin: "of the dean") is the side of a church choir occupied by the Dean. In English churches this is typically the choir stalls on the south side of the chancel. The opposite side is known as Cantoris.
The association of the Dean with the south side has propagated from the Sarum (now Salisbury Cathedral) liturgical norm, a practise that then propagated through pre-Reformation England and Wales. There are some notable exceptions in the monastic cathedrals, where the senior cleric under the bishop was the prior; he often sat on the liturgical north. Hence, in Durham Cathedral, St Davids Cathedral, Carlisle Cathedral and Southwell Minster, decani is on the north.
Usage examples of "decani".
Each sign of the Zodiac was considered to have three decani, occurring at intervals of ten days.
In this city there are many jewels which are brought from Pegu and Celani (Ceylon), and in the country itself many diamonds are found, because there is a mine of them in the kingdom of Narsinga and another in the kingdom of Decani.