noun, plural tri·clin·i·a /-ˈklɪniə/Show Spelled[-klin-ee-uh]Show IPA. Roman History.
1.
a couch extending along three sides of a table, for reclining on at meals.
2.
a dining room, especially one containing such a couch.
Origin: 1640–50; < Latintrīclīnium < Greektriklī́nion, diminutive of tríklīnos having three couches (adj.), dining room so furnished (noun), equivalent to tri-tri- + klī́n(ē) couch (see clinic) + -ion diminutive suffix