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.
March 31, 2015. DSN is the acronym for the Defense Switched Network. According to the Department of Defense's Defense Information Systems Agency, The DSN system is used only for official business or in the interest of the government and is the first choice for all switched voice and dial-up video telecommunications between DoD user locations..