Definition of Frater
In the civil law, a brother. Frater consanguineus, a brother having the same father, but bom of a different mother, Frater uterinus, a brother bom of the same mother, but by a different father. Frater nutricius, a bastard brother
That's the definition of Frater in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.