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.
A DN (Distinguished Name) syntax attribute in Active Directory whose value is based on a Link Table and the value of a related forward link attribute. For example, the member attribute of group objects is the forward link, while the memberOf attribute is the related back link. Acronym for Backup Domain Controller.