GregNysLR.209.2 :ܠܓܒܐ ܗ݀ܘ ܐܚܪܢܐ ܕܠܩܘܒܠܗ‏ : that other, opposite side [of the Earth, from the Sun]
See the entire entry for gaḇ (geḇ), gabbā n.m. side, flank: