
A battern (qv) placed on the floor of the stage, usually to light a cyclorama (qv). Also occasionally used to mean freestanding scenery, of a low height, running along the back of the stage in front of the back wall or cyclorama.
Found on
http://www.encyclo.co.uk/local/21207

1) A row of lanterns on the floor of the stage for lighting the bottom area of a cyclorama or cloth. This is usually masked by a scenic groundrow. 2) Shaped pieces of scenery usually less than a metre high. Also Scenic Groundrow.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

(1 - Staging) A low piece of scenery at floor level. (2 - Lighting) A row of luminaires on the floor.
Found on
https://hdos.org.uk/gen/glossary.html

Low topped piece of flat scenery, profiled and painted to represent ground foliage, a bank of earth, a distant mountain range, etc., designed to stand up independently on the stage, used to mask cyclorama lighting units.
Found on
https://www.encyclo.co.uk/local/20411

A battern (qv) placed on the floor of the stage, usually to light a cyclorama (qv). Also occasionally used to mean freestanding scenery, of a low height, running along the back of the stage in front of the back wall or cyclorama.
Found on
https://www.encyclo.co.uk/local/21782
No exact match found.