1. a preliminary or preparatory experiment conducted before a main experiment
Usage: technical; research context

1. relating to or occurring before the main experiment; preliminary in nature
Usage: technical; research context

Examples

• The researchers conducted a preexperiment to test their equipment and procedures.
• Preexperiment trials helped identify potential problems before the full study began.
• The preexperiment phase lasted two weeks and involved a small sample group.
• We used preexperiment data to refine our hypothesis.
• The team's preexperiment results suggested the main experiment would be successful.