[TA] portion of the liver receiving blood from the left branches of the hepatic artery and portal vein, and from which bile is drained via the left hepatic duct; the plane of the middle hepatic vein (demarcated externally on the visceral surface by the fossae for the gallbladder and inferior vena cava and on the diaphragmatic surface by a line extrapolated from the gallbladder to the terminal inferior vena cava) separates left from right liver. SYN: pars hepatis sinistra [TA], left part of liver*.