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LUKOS. TTie organs of respiration in 

 warm-blooded animals. There are two 

 of these organs, each of which occupies 

 its cavity in the thorax. Their substance 

 is of four kinds vesicular, vascular, 

 bronchial, and parenchymatous. The vesi- 

 cular substance is composed of air-cells. 

 The vascular invests those cells like a 

 net-work. The bronchial is formed by 

 the ramifications of the bronchia through- 

 out the lungs, having the air-cells at the 

 extremities : and the spongy substance 

 which connects those parts is termed the 

 parenchyma. 



LUNISO'LAR, from luna, the moon, and 

 Solaris, from sol, the sun ; compounded of 

 the revolutions of the sun and moon. 

 Thus, the lunisolar year is equal to 532 

 common years, found by multiplying the 

 cycle of the sun by that of the moon. 



LU'NISTICE, from Iwie, the moon, and 

 sto, to stand. The furthest point of the 

 moon's northing and southing in its 

 monthly revolutions. 



LU'NULAR, Lat. lunularis, ( Crescent- 



LV'XULATE, Lat. IwmJattis. \ shaped, 

 or half-moon-like. Applied, in botany, to 

 leaves, pods, &c. 



LC'PIA. A genus of diseases, including 

 encysted tumours, the contents of which 

 are of a pultaceous-like consistency : from 

 Xtma, to molest. 



LC'PIXOSE, lupin-like. An epithet for 

 a cutaneous disease, a species of porrigo. 



LUPI'NI-S, the lupine. A genus of legu- 

 minous plants of many species. Diadel- 

 phia Decandria. Name, according to 

 Martin, from lupus, a wolf, because plants 

 of this genus ravage the ground by over- 

 running it. Lupines are cultivated in 

 this country chiefly as a manure. 



LU'PCLINE. The bitter principle of the 

 hop (Hutnulus lupulus, Lin.), is thus 

 named by Dr. Ives. It is an impalpable 

 yellow powder, obtained by beating and 

 sifting the hops used in brewing. 



LU'PCLCS. An old name for the hop- 

 plant, from Jitunj, on acconint of its bitter- 

 ness. See HrMCLDS. 



LUPUS. 1. In zoology, the wolf, a species 



of the genus Cam's. 2. In astronomy, 



the wolf, a southern constellation.-: 3. 

 In nosology, a disease of the face, other- 

 wise called noli-me-tangere, touch-me-not. 



LURCH'ER. A poacher; a dog more used 

 by poachers than sportsmen. The body 

 is slender, the legs strong, tail straight, 

 and the hair long and rough, 



LU'RIDJE, from luridm, livid, ghastly. 

 A natural order of plants, tho twenty- 

 eighth in the natural method of Linnaeus, 

 consisting of such as are highly poisonous, 

 as the datura, atropa, &c. 



LUSTRJL'TION, from lustro, to purify, a 

 purifying. The lustration was a ceremony 

 of purification, which the Romans per- 



formed on their cities, fields, armies, and 

 people, on various occasions, but espe- 

 cially after the numbering of the people by 

 the censors, every fifth year. See LVTRCM. 



LUS'TRE. In mineralogy, lustre is of five 

 kinds. (1.) Splendent, when the lustre can 

 be seen at a great distance. (2.J Shining, 

 when the reflected light is weak. (3.) 

 Glistening, when observed only at a short 

 distance (4.) Glimmering, when the sur- 

 face presents only luminous point*. (5.) 

 Dull, when the surface has no lustre. 



LUS'TRUM, Lat. from lustro, to purify. 

 A term, among the Romans, for the space 

 of five years, at the end of which the 

 people paid the census or tribute, and 

 were sprinkled and purified from all prior 

 defilements. See LUSTRATION. 



LUTE. In music, a stringed instrument, 

 containing at first only five rows of 

 strings, to which were afterwards added 

 six more, with nine or ten stops. 



LUTE, | from Ititum, clay. A compo- 



LUTIXG, J sition of clay, or other tena- 

 cious matter, for stopping the junctures of 

 chemical apparatus, to prevent the escape 

 or entrance of gas or air. 



LUT^OLINE. The yellow colouring matter 

 of weld {hiteola). When sublimed it crys- 

 tallises in needles. 



LU'THERAN. In architecture, & kind of 

 window over the cornice, in the roof of 

 a building, to admit light into the upper 

 story. 



LU'THERANISM. The doctrines of Martin 

 Luther, an Augustine friar, who sepa- 

 rated from the church of Rome about 

 1515, and took the lead in what is now 

 called the Reformation. 



LU'TRA. A genus of carnivorous animals 

 of the digitigrade tribe, comprising the 

 otters, of which there are many species. 

 The European, American, and sea otters 

 are the best known. Name from Lat. 

 lutra or lytra, probably derived from 

 lutum, mud. ' 



LYCAN'THROPT, Gr., from foxes, a wolf, 

 and vflfares, a man. 1. A superstitious 

 belief that men were sometimes changed 



into wolves. 2. A species of madness 



so called. 



LYCE'UM, hvxiio*. A celebrated school 

 at Athens, where Aristotle taught. 



LTCH'NIS. A genus of hardy perennial 

 plants. Dtcandria Pentagynia. Europe. 

 The Ragged Robin is a British species. 

 The Greek name }.y%vos, a torch, was 

 common to several plants. 



LYCH'NITES, Jiu%voj. An ancient name 

 of marble, its quarries being worked by 

 lamp-light. 



LYCOPER'DON, the puff-ball. A genu 

 of fungi of many species, as the mollipuf, 

 deerball, truffle, &c. Name from s-jx&, 

 a wolf, and mfiv, pedo. 



