Definition of abscissa. plural. abscissas. also. abscissae. play \-Ësi-(Ë)sÄ\. : the horizontal coordinate of a point in a plane Cartesian coordinate system obtained by measuring parallel to the x-axis â compare ordinate.
Most RV parks provide either partial hookups, which include electricity and water, or full hookups, which add sewer service. Some deluxe parks also include hookups for cable television and telephone lines.
Close the black tank dump valve and disconnect the sewer hose from the park sewer (leave it connected to your RV). Hold the loose end of the sewer hose as high as you can above your head, get someone else to fully reopen the black tank dump valve and slowly add water from a water hose.