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.
File DSN: Any user who has access to the File: In a file format (*.dsn) System DSN: Any user on that system: System Registry: User DSN: Only for the user for which that data source was created: System Registry: UDL (Universal Data Link) Any user who has access to the File: In a file format (*.udl) DSN-less : Any one who has access to the database files (i.e. mdb,.xls)