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Octostylos.

Odeum.

Oecus.

Opae.

Orchestra.

and over the centre of each of the metopae. In the undersurface there are eighteen guttae, or drops, arranged inthree rows.

O.

A portico which has eight columns in front. Derivedfrom oVrw, eight, and <rru'xoy, a column.

A small theatre for the recitation of musical compositions:generally in the neighbourhood of the theatre. The odeumat Athens was contiguous to the theatre of Bacchus. Theodeum at Pompeii also adjoins the theatre.

The banqueting room of a Roman house. There wereseveral kinds of oeci; viz. Corinthian, Tetrastyle, Cyzicene,and Egyptian. In the Greek house the oeci were spaciousapartments, in which the mistress of the family employedherself and servants at the loom. The word is derived fromthe Greek fim, which was generally used to signify thewhole house.

The cubilia, or beds, of the beams of a roof. SeeMetopae.

The area of the theatre comprised between the lowerrange of seats and the proscenium. In the Roman theatrethe orchestra was appropriated to the senators; but in thetheatres of the Greeks the orchestra was the scene of actionof the dancers, who were termed or opxn^pss; whence

the term opx >is derived.