lacquer tree noun4 •Any of three species of tree that is tapped in order to make lacquer from the sap. •Toxicodendron vernicifluum, a tree found in China, Japan, and Korea, whose sap contains urushiol. •Toxicondendron succedanea, a tree found in Taiwan and Vietnam, whose sap contains laccol. •Gluta usitata, a tree found in Cambodia, Laos, Myanmar, and Thailand, whose sap contains thitsiol. formslacquer trees