Session

 

The term session (see recess) refers to the period of time when the legislature is assembled and conducting official legislative business.

 

U.S. Senate Definition

 

The period during which Congress assembles and carries on its regular business. Each Congress generally has two regular sessions (a first session and a second session), based on the constitutional mandate that Congress assemble at least once each year.

 

Reference: http://www.senate.gov/reference/glossary.htm