part_of part of part of forebrain arachnoid mater forebrain meninges forebrain arachnoid mater arachnoid mater of forebrain arachnoid mater of neuraxis of forebrain An arachnoid mater that is part of a forebrain [Automatically generated definition]. MA:0000884 UBERON:0003556 forebrain arachnoid mater of neuraxis forebrain arachnoid arachnoid of forebrain