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.
Noun. 1. DSL-a generic name for digital lines that are provided by telephone companies to their local subscribers and that carry data at high speeds. digital subscriber line. phone line, subscriber line, telephone circuit, telephone line, line-a telephone connection.