Also see definition of "triclinium" in Bible Study Dictionaries
Word Study
triclinium
CIDE DICTIONARY
A couch for reclining at meals, extending round three sides of a table, and usually in three parts. [1913 Webster]
OXFORD DICTIONARY
triclinium, n. (pl. triclinia) Rom. Antiq.
1 a dining-table with couches along three sides.
2 a room containing this.
1 a dining-table with couches along three sides.
2 a room containing this.
Etymology
L f. Gk triklinion (as TRI-, kline couch)
Also see definition of "triclinium" in Bible Study Dictionaries
For further exploring for "triclinium" in Webster Dictionary Online