Trigonum, Gr. and R. (τρίγωνον). (1) A mosaic of triangular pieces of marble, glass, terra-cotta, or other material (sectilia). Fig. [662] is from a pavement at the entrance of a house at Pompeii. (2) A musical stringed instrument; a triangular lyre, probably derived from Egypt.

Trilith, Celt. (τρί-λιθος). A Celtic monument of three stones forming a kind of door.

Trilix, R. In weaving, triple thread. (Compare Bilix.)

Trilobate, Arch. Presenting three foils.

Trimodia, R. A basket or vessel made to contain three modii (tres modii).

Trinity, Chr. For a detailed account of the progressive series of representations in Art of the Holy Trinity, consult Fairholt’s Dictionary, Didron’s Iconographie Chrétienne, &c.

Triobolum, Gr. A Greek silver coin of the value of three oboli. It was the established fee payable to an Athenian dikast for the hearing of a cause.

Tripetia. A Gallic term signifying a three-legged stool.

Fig. 663. Tripod.