The side of the Golgi apparatus
which faces the rough endoplasmic reticulum
, where vesicle
s budding off of the rough endoplasmic reticulum fuse to the Golgi apparatus. Also called the "cis" side of the Golgi apparatus.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.