n.a jury of 12 to determine the facts and decide the issue in civil or criminal proceedings
同义词：petty jury
英汉双解大词典
petit jury
1.
N（名词）
a jury of 12 persons empanelled to determine the facts of a case and decide the issue pursuant to the direction of the court on points of law 小陪审团 (Also called petty jury) → compare grand jury