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.
Definition of:DDNS. (D ynamic DNS) A service that lets anyone on the Internet gain access to resources on a local network when the Internet address of that network is constantly changing.Such resources are typically a Web server, Webcam or a PC for remote control operation.or residential users of Foscam's IP network cameras, the company offers its own DDNS service to allow remote access to the camera. As in this example, a DDNS URL is assigned to a new user in case the Internet provider changes the IP address.