LEX SEMPRONIA

lex Sempronia (leks sem-proh-nee-[schwa]). [Latin] Roman law. A law of 122 B.C. transferring the duty of jury service from the senators to the equestrians (knights). • The control of the juries in the quaestiones perpetuae, particularly in extortion (repetundae) trials, was one of the key areas of political conflict in the late Republic.