L U M 



439 



LUN 



limestone, named after the consul Lu- 

 cullus, who admired the compact variety 

 of it so much as to honour it with his 

 name. There are three varieties, the 

 compact, prismatic, and foliated. The 

 compact again is divided into the common 

 or black marble and stinkstone. 



LU'ES. A plague or poison, from Xvu, to 

 dissolve, because it produces dissolution. 



Lrrr. 1. In nautical language, a luff 

 (Arm. loff] , a weather-gage cr part to- 

 wards the wind. - 2. To luff (Arm. loffi), 

 to turn the head of the ship towards the 

 wind. Hence, in the imperative luff is 

 the order of the helmsman to put the tiller 

 towards the lee-side of the ship, in order 

 to make the ship sail nearer the wind. 

 Luff round, or luff a-lee, is the extreme of 

 the movement intended to throw the ship's 

 head into the wind. A ship springs her 

 luff when she yieldt to the helm by sail- 

 ing nearer the wind. 



LUF'FER BOARDING, Fr. lorn-re. In archi- 

 tecture, a series of inclined boards for 

 filling an aperture in a wall, which ad- 

 mit air, while they exclude rain. 



LUFF-TACKLE. A large tackle, not des 



tined for any particular place in 

 but is moveable at pleasure. 



ship, 



LUO'GEU, Dut. loger. A. vessel carrying 



three masts, with a running bowsprit and 

 long sails. 



LUO'-SAIL. A small square sail, bentupon 

 a yard that hangs obliquely to the mast 

 at one third its length. 



LXJMACHEL', Ital. lumachella, shell-mar- 

 ble. A- variety of common compact lime- 

 stone, which abounds in the sandstone 

 and coal formations in England and Scot- 

 land, and in Ireland, wherever clayslate 

 and sandstone occur. Great part of it is 

 made up of shells and corals conglutin 

 ated; its predominant coloured delinea- 

 tions are red ; whence it is also cajled^re 

 marble. 



troublesome fixed pain about the loins 

 and ligaments of the back. 



LUM'BAR. Appertaining to the loins 

 (lumbi), as the lumbar-region: the loins. 



LUM'BRICAL, Lat. Iwnln-icalis, resem- 

 bling the earth-worm (lumbricus ) . an 

 epithet of certain muscles, as the small 

 flexors of the fingers and toes. 



LUM'BRICUS. A genus of worms, com- 

 prising the common earth-worms (L. ter- 

 restris, Lin.). Class Articulata ; order 

 Abranchiata, Cuv. Named lubricate, from 

 its slipperiness. 



LUMP'ERS. Labourers employed to load 

 and unload merchant ships when in har- 

 bour. 



LVMP'FISH, Lumpsucker. A fish, the 

 Cydoptems Lumpus, Yarr., called also sea- 

 owl. The male fish, called cock-padle, is 

 much smaller than the female or hen-padle. 



LD'NA. In astronomy, the moon. In 

 alchemy, silver. 



LC'NA COS/NBA, horn-silver. Chlorideof 

 silver. 



LU'NAR, from luna (q. v.). I. Relating 

 to the moon, as the lunar orbit. - 2. Re- 

 lating to silver, as lunar caustic, or nitrate 



of silver. 

 wrist bones. 



3. Lunar bone, one of the 

 Lunar cycle, the period 



of time after which the new moons re- 

 turn on the same days of the year. 

 5. Lunar distance is the distance of the 

 moon from the sun, or from a fixed star 

 or planet, employed at sea in finding the 

 longitude of a ship : this is called the 

 lunar method. - 6. A lunar month is the 

 time in which the moon revolves about 

 the earth. - 7. A lunar year is 12 lunar 

 months, or 354 days, 8 hours, 48 niiii., 34 

 sec. 



LUNA'RE, Os. One of the bones of the 

 carpus ; so named from its shape. 



LU'NATE, Lat. lunatus, crescent-shaped. 

 Formed like a half-moon. 



LU'NATIC. 1. In law, a person who is 

 sometimes of a sound mind, and at other 

 times is not : these paroxysms being sup- 

 posed to be regulated by the moon (luna). 

 - 2. Applied adjectively to any disease 

 supposed to be regulated by the changes 

 of the moon. 



LCNA'TION, from luna, the moon. The 

 space of time between one new moon and 



another, named also the synodical 



th 



LUMBA'GO. from Itcnbi, the loins A ] sion 



It consists of 29 days, 12 hours, 44 min., 

 3 sec. 



LUNETTE', Fr. from June, the moon. 1. 

 In fortification, an enveloped counter- 

 guard, Or elevation of earth, made beyond 

 the second ditch, opposite to the place 

 of arms. Lunettes consist of two faces, 

 forming an angle mwards, and differ 

 from a ravelin only in their situation. 

 - 2. In optics, a description of glasses or 

 upectacles are called lunettes. - 3. IB 

 architecture, an aperture for the adou 



in a concave ceiling 



