Adjective:

1. lacking light; especially not reached by sunlight;

   "the aphotic depths of the sea where no photosynthesis occurs"
   

APabbr.联合通讯社（=Associated Press）；附加保险费（=additional premium）aphearmor-piercing high-explosive 高爆穿甲弹

aphotic layer无光层

aphotic zone非生化带,无光带,不透光带,无光深水区