Lewis Short
dĕcānus (noun M) : decem.
* A chief of ten, one set over ten persons (late Lat.).
* Over soldiers, Veg. Mil. 2, 8.
* A kind of officer at the imperial court, Cod. 12, 27, 1.
* In astrology, the chief of ten parts of a zodiacal sign, Firm. Math. 2, 4.
* As a judge, Vulg. Exod. 18, 21; Deut. 1, 15.
Charlton T. Lewis, Charles Short, A Latin Dictionary