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.
Data Source Name (DSN) settings connect to a database on a Windows system. Any user on the system can use the DSN to connect to the database. The DSN contains the username, password and server name for the database, so it's not necessary to re-enter these login credentials each time the user wants to connect.Step 1.ny user on the system can use the DSN to connect to the database. The DSN contains the username, password and server name for the database, so it's not necessary to re-enter these login credentials each time the user wants to connect. Step 1.