Experimental (4)
'experimental' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for test that I've seen before include "Critical examination or trial of qualities or abilities" , "Cricket match; exam" , "Examine to play international cricket match" , "criterion" , "Trial; Hampshire river" .)
'experimental' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for trial that I've seen before include "Court proceeding" , "Test of performance" , "Court proceedings" , "Criminal court case" , "Legal proceedings or a test run" .)