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.
In addition to nonsecure voice, data, and video services, the DSN will provide transmission, switching, and support services for Secure Telephone Units, Third Generation (STU-IIIs, now obsolete), the Secure Terminal Equipment (STE), the Defense Red Switch Network (DRSN), the dial-up alternative routing for the Unclassified but Sensitive Internet Protocol (IP) Router Network , and the Secret IP Router Network .