PACXn.专用自动计算机交换机PACabbr.太平洋的(=Pacific)abbr.无人驾驶飞机(=Pilotless Aircraft)abbr.政治行动委员会(=political action committee)Pac-Man collection小精灵全集pachytene checkpoint粗线期关卡pachyderma verrucosa[医] 疣状喉皮肥厚, 疣状声带肥厚Pachycephalosauridae肿头龙科pachydermoperiostosis厚皮性骨膜病Pachysandra axillarisn.板凳果Pacifec round herring脂眼鲱pachydermic cachectic粘液性水肿的pachytene chromosomes粗线期染色体Pachypleurum muliensen.木里厚棱芹