PACl聚合铝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)Pachycephalidaen.啸鹟科pachymeningitic[医] 硬脑[脊]膜炎的pachytene stage粗线期pachyderma oris口腔厚皮病, 局灶性角化病, 过度角化病pachydermatosis皮肥厚病Pachystermine B粉蕊黄杨环氮碱B, 富贵草酰胺碱BPachon's ethodspacing function起搏功能pachymeningitis[医]硬脑膜炎pachycepbalosaurn.[古生]肿头龙