What does «primo hermano o carnal» mean in Spanish?
-  (primo hermano, primo carnal) Son    of the carnal uncle. Formerly called corman cousin. The first cousin (or    carnal cousin) is the person whose kinship with another comes from the    parents being siblings. The degree of kinship between them is the fourth by    collateral consanguinity.
 Examples of use in Spanish: "entre primos hermanos existe impedimento dispensable para el matrimonio".
 
 "en la sucesión intestada los primos hermanos constituyen el último orden colateral, según el código civil".