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.
retroperitoneal space. the space between the peritoneum and the dorsal abdominal wall. retropharyngeal space. the space behind the pharynx, containing areolar tissue. subarachnoid space. the space between the arachnoid and the pia mater, containing cerebrospinal fluid.subdural space. the space between the dura mater and the arachnoid.etroperitoneal space the space between the peritoneum and the posterior abdominal wall. retropharyngeal space the space behind the pharynx, containing areolar tissue. subarachnoid space the space between the arachnoid and the pia mater, containing cerebrospinal fluid.