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.
Name servers are often called DSN servers as well, and this is likely the origin of all of the confusion associated with name servers and the DNS. Every web site has two name servers to which it is pointed, and this process must be done by the webmaster upon purchasing a domain and a hosting account.