radÂ·iÂ·cal. (rÄdâ²Ä­-kÉl) adj. 1. Arising from or going to a root or source; basic: proposed a radical solution to the problem. 2. Departing markedly from the usual or customary; extreme or drastic: a radical change in diet.
rlogin (remote login) 1  Securing VMware Virtual Infrastructure with Centrify's Identity and Access  ... Rlogin (remote login) is a UNIX command that allows an authorized user to login to other UNIX machines (hosts) on a network and to interact as if the user were physically at the host computer.
Immunoglobulin D, also called IgD, is an uncommon antibody that is produced by  immature B cells. The exact purpose of this antibody is unknown, though it has something to do with the humoral immune response in humans and other animals. It is similar in function to immunoglobulin M, which is also produced by B cells. Like many other immunoglobulins, IgD is made up of four chains of amino acids. Two heavy and two light chains are connected by a hinge in the middle.