1. 1  any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.
data source name (DSN) A data source name (DSN) is a data structure that contains the information about a specific database that an Open Database Connectivity ( ODBC ) driver needs in order to connect to it.
+1 It would have been slightly more helpful to include what DSN stands for. I think it stands for database source name, but someone correct me if that is not right (I am also new to all of this). â Shadoninja Sep 21 '17 at 18:12