or DIADEM, a town of Turkish Armenia, situated on an eastern branch of the Euphrates, which is here not above twenty feet broad, and very shallow. The houses are built of wood and stones, and, with the exception of one apartment, afford shelter to cattle as well as men. It has a citadel fortified with towers, in which the governor resides. Near it is a large monastery of the Armenians, which is sometimes attacked by predatory bands, who also occasionally assail the town. It contains 600 houses, and is seventy-two miles south-west of Erivan, and 140 south-east of Erzurum.

DIERESIS, in Grammar, the division of one syllable into two, which is usually noted by two points over a letter, as autai, instead of autar, dissolvienda for dissolviendo.

DIEETELE, in Grecian antiquity, a kind of judges, of which there were two sorts; the cleroti and diallocteri. The former were public arbitrators, chosen by lot to determine all causes exceeding ten drachmas within their own tribe; and from their sentence an appeal lay to the superior courts. But the latter, on the contrary, were private arbitrators, from whose sentence there lay no appeal; and accordingly they always took an oath to administer justice without partiality.