JAUHARI (ABU NASR ISMA^EIL IBN HAMMAD UL-JAUHARI) (d. 1002 or 1010), Arabian lexicographer, was born at Farab on the borders of Turkestan. He studied language in Farab and Bagdad, and later among the Arabs of the desert. He then settled in Damghan and afterwards at Nishapur, where he died by a fall from the roof of a house. His great work is the _Kitab us-Sahah fil-Lugha_, an Arabic dictionary, in which the words are arranged alphabetically according to the last letter of the root. He himself had only partially finished the last recension, but the work was completed by his pupil, Abu Ishaq Ibrahim ibn Salih ul-Warraq. An edition was begun by E. Scheidius with a Latin translation, but one part only appeared at Harderwijk (1776). The whole has been published at Tebriz (1854) and at Cairo (1865), and many abridgments and Persian translations have appeared; cf. C. Brockelmann, _Geschichte der arabischen Literatur_ (Weimar, 1898), i. 128 seq. (G. W. T.) JAUNDICE (Fr. _jaunisse_, from _jaune_, yellow), or ICTERUS (from its resemblance to the colour of the golden oriole, of which Pliny relates that if a jaundiced person looks upon it he recovers but the bird dies), a term in medicine applied to a yellow coloration of the skin and other parts of the body, depending in most instances on some derangement affecting the liver. This yellow colour is due to the presence in the blood of bile or of some of the elements of that secretion. Jaundice, however, must be regarded more as a symptom of some morbid condition previously existing than as a disease _per se_. Cases with jaundice may be divided into three groups. 1. _Obstructive Jaundice._--Any obstruction of the passage of bile from the liver into the intestinal canal is sooner or later followed by the appearance of jaundice, which in such circumstances is due to the absorption of bile into the blood. The obstruction is due to one of the following causes: (1) Obstruction by foreign bodies within the bile duct, e.g. gallstones or parasites; (2) inflammation of the duodenum or the lining membrane of the duct; (3) stricture or obliteration of the duct; (4) a tumour growing from the duct; (5) pressure on the duct from without, from the liver or other organ, or tumours arising from them. Obstructions from these causes may be partial or complete, and the degree of jaundice will vary accordingly, but it is to be noted that extensive organic disease of the liver may exist without the evidence of obstructive jaundice.