What's the difference between i.e. and e.g.?
late 14c., "gate, gateway," from Old French portal "gate" (Modern French portail) and directly from Medieval Latin portale "city gate, porch," from neuter of portalis (adj.) "of a gate," from Latin porta "gate" (see port (n.1)).
portal por·tal (pôr'tl)
Of or relating to a porta or hilum.
Of or relating to the portal vein or the portal system.
Of or relating to a point of entrance to an organ, especially the transverse fissure of the liver, through which the blood vessels enter.
The portal vein.
The point of entry into the body of a pathogenic microorganism.
A Web site that provides a gateway to other Web sites.