Relating to the portal vein, biliary ducts, and hepatic artery, which have similar distributions. ... See: portal triad. ... (05 Mar 2000) ... 
Type: Term Pronunciation: pōr′tō-bil′ē-ō-ar-tē′rē-ăl Definitions: 1. Relating to the portal vein, biliary ducts, and hepatic artery, which have similar distributions.