The term TRIAL ROOM can be broken down into two words, 'TRIAL' and 'ROOM'. The word 'TRIAL' is defined as a formal examination of evidence by a judge in a court of law to decide guilt or innocence in a legal matter. The word 'ROOM' is defined as an area within a building that is enclosed by walls, floor, and ceiling. Together, the term TRIAL ROOM can be interpreted as a ROOM in a court of law where evidence is examined and a verdict is reached. The crossword solution for the term TRIAL ROOM is LAB, which stands for Laboratory. A laboratory is a ROOM or building equipped for scientific experiments, research, or teaching. In this context, the laboratory could be used to examine evidence in a TRIAL ROOM.