DI 
ig reprefented with a diadem, adorned with rays: though 
even after Conttantine, when the diadem was become the 
the 
Julian, while only ens ; Laas it is pretty certain, he did 
not wear iteuntil he uguttus. Du-Cange will not 
affert, that sia ee fr took the diadem ; but only, t that 
e firft made it into a cafk, or clofe crown, as is feen 
in fome of his medals, and thofe of his fucceffors. 
ADEM, In pales les is applied to certain ci ircles or rims, 
ferving to bind or enclofe the crowns of fovereign princes ; 
and to bear the sites a crofs, or the fleurs dc-lis, for their 
The crowns of fovereigns differ in this, that fome are baw 
with a greater, and fome with a lefs, number of diadems. 
Prelates likewife appear to _ anciently worn a fort : 
diadem; thus Baronius writes, t St. James the apo 
wore a gold plate on his Merete as a mark of his eilcope 
dignit 
a blazoning, the bandage about the heads of Moo 
fhields, 1 is, fometimes alfo called diade The term cd: aes 
hi 
greater dignity than to be crowned, as ake eae of other 
aa are. 
DIADES Aruena, in Ancient Gener. See Dia 
DIADOCHUS S, in Na dee prstaiaed be name given by 
the ancients to a gem, approachin ‘6 eo nature of the 
aula or aqua-marina, oe ly a a fapphire; for they bad 
culiar generical name for that gem, but called the 
beaunifal deep coloured ones only fky-blue beryls, berylli 
ides. The writers of the middle age have given ftrange 
accounts of the magical virtues of this ftone, 
up fpirits, and many other the like things, on being thrown 
into water: they faid, however, that if it anaes by any 
accident to touch a dead body it loft all its virtue. 
DIADOCOPOTIS, in Ancient Ca a oun of Afia, 
in the Perfide. Steph. Byz 
OME, from Me and Jgo05, curfus, is fometimes 
ufed for the aay motion, or {wing 0 u 
n Grammar, is a figure whereby a * diph- 
thong is divided ic two oa as aule into aulai, picte 
into pictai, aque into aqua 
1eREsis isalfo ufed, ina aon fenfe, for any divifion 
of one fyllable into two: that verfe = Tibullus, 
s* Stamina non ulli diffoliinda neo = diffolvend 
This is ufually noted by two points placed over a letter, 
to fhew that it is to be founded by itfelf, and not joined with 
any other fo as to ma ake it a diphthong: thus aéra, by the 
ae over thee, is diftinguifhed from era. 
s alfoa kind of aaa ae or addition to a word, by 
dividing one fyllable into two: as aulae, by a dizrefis, isa word 
he Gilles ‘attead of aule. See Tmests. 
RESIS, 1D Surgery: the operation of dividing and repair. 
ing erheg bipee on and continuity were an obftacle to 
the cure ; which were joined and conglutinated contrary 
to ay et a natu 
The word, in its neil Greek, diaesois, fignifies divifion, 
There are five ways of performing the d@refis, wiz. by 
cutting, pricking, tearing, drawing, and burnin 
DI ETA, Ascsrntes, from dsoiraw, en ze, among 
the Athenians, were of two forts, the cleroti and dialaterii. 
lot, 
DIA 
fentence, however, was not final, an appeal lying from it to 
the ae courts, 
ne dialaGterit, on the contrary, were private arbitrators, 
from whofe fentence there lay no appeal; and acco ingly 
always took an oath to adminiiter jultice, without par- 
a which the cleroti a not. Potter’s Archeol, Grec. 
. |. cap. 22. tom. i. p. 122, feq. 
DIA ERT, in Giagrapy. a town of Perfia, in the pro» 
vince of Cuorafan ; 3 135 miles N. of Herat. 
DIAGEBRES, in pe Geography, a ea of the 
ifland of Sardinia, according to Stra 
I Cc 
engraving, cutting, or otherwife one. holiow or concave 
i abe in paar 3 fuch as feals, intag los, matrices for coins 
r medals, & See SCULPTUR 
DIAGNOSIS, io shinai aa di and ywwonw, T know. 
the diftinction of then of one difeafe from that of oa 
other, refembling it, a means of a colle&ed view of the 
fymptoms ; whence 
medicine ; and it is the poffeffion of this knowledge by which 
the judicious pees rifes fo far eat to the empiric. 
O n Geometry, a right line drawn acrofs a 
arallelogram, or fhe: lero a from the vertex 
of one angle to that of anot 
uch is the line P N (Plate ‘VL Geometry, fig. 75.) drawn 
hens the angle P to 
Some eit call it diameter, and others the diametral 
of the figur 
It is aeaentiatel: 1. That every diagonal dividesa paral. 
lelogram pe two equal parts; for the oppofite fides, O P, 
N Q. and ON, PQ, being parallel (7g. 75.) and the alter- 
nate angles QNP, OPN,andQPN,PNO being r 
ively equal, and a fide N P, common 
= OP, wiil ee M=MP P, and OM = 
3 ee diagonal of a fquare is incommenfurable with one of 
its fides. 
e  Aca- 
equal ; an 
€ ve 
The demonitration, in chligeaaled paellig atts: is 
thurs 
