Definition of Foreign Direct Investment Foreign direct investment (FDI) is an investment in a business by an investor from another country for which the foreign investor has control over the company purchased.
Spinal anaesthesia. Spinal anaesthesia (or spinal anesthesia), also called spinal block, subarachnoid block, intradural block and intrathecal block, is a form of regional anaesthesia involving the injection of a local anaesthetic into the subarachnoid space, generally through a fine needle, usually 9 cm (3.5 in) long.
Medical Definition of SUBARACHNOID SPACE. : the space between the arachnoid and the pia mater through which the cerebrospinal fluid circulates and across which extend delicate trabeculae of connective tissue. the space between the arachnoid and the pia mater through which the cerebrospinal fluid circulates and across which extend delicate trabeculae of connective tissue.