Lozenge To Lye

Lozenge to Luminous

halves are mounted at or near the bottom of the fuselage.
Lozenge. Name applied to' a rhom­bus-shaped figure when used as a unit of decoration as in a lozenge' molding. .
Lozenge molding. (Arch.) A molding characterized by lozenge-shaped ornament; used in connection with Nonnan architecture.
Lubricant. (Engin.) Oil, grease, gra­phite, and in general, anything of the sort used to overcome friction and to pennit a freer action of p~. (Mach.) Also used to exert a cooling action on tool and material that is being cut. The lubricant used for this purpose also removes chips and imparts smoother finish to the parts worked upon.
Lubricant bloom. (Plast.) Irregular, cloudy, greasy exudation on the surface of a plastic.
Lubrication. (~ngin.) The act of ap­plying lubricants.
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Ludlow typograph. (Print.) A slug­casting machine used extensively for casting borders, rules, display lines, etc.
. Lug. (Mach.) A projection of irregu­lar shape as from a casting.
Lug clamping. (Patmkg.) Clamping action accomplished by passing a bolt through halved or split lugs which are a part of the object to be bound to some other pieces.
Lug sill. (Bldg.) A type of sill longer than the width of the window open­iug in stone or brick walls. Such a sill differs from a "slip sill" in that its ends are "let in" to the wall.
Lumber. Timber cut to size in mar­ketable fonn, as boards, planks, etc.
Lumber-scale. A graduated measur­ing scale for determining the number of board feet in rough­sawed lumber.
Lumen. The unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one-candle intensity.
Lumen bronze. (Metal.) An alloy of 86 per cent zinc, to per cent cop­per, and 4 per cent aluminium. It is particularly valuable for high­speed bearings which do not carry a heavy load.
Luminance. The state or quality of being luminous; the quality or con­dition or radiating or reflecting light; the quantitative measure of brightness of a solid angle emitted per unit projected area of the source or surface.
Luminescence. The emission of light occurring at a temperature below that of incandescent bod­ies; the light porduced by such an emission.
Luminosity. luminance; something luminous.
Luminous. radiating or emitting light.

Luminous flux. The rate of transmis­sion ofIuminous energy ex peres sed in lum.ens.
Luminous paint. A paint which makes objects visible in the dark.
Luminous intensity. The luminous flux in lumens emitted per unit solid angle by a light source, meas­ured in candel as.
Lump lime. Lime made from lime­stone burned or calcined in kilns. Lunar. Of or pertaining to the moon. Lunette. (Film.) A chandelier with glass pendants.
Luster. (Mineral) Appearance of a surface resulting from its light­ reflecting qualities.
Lute. (I) To seal a joint as to pre­vent admission of air. (2) The material used for this purpose.
Lux. A unit of ilIumination, equal to the illumination produced by luminous flux of one lumen fail­ing perpendicularly on a surface of one meter square.
Lye. (Chern.) Sodium hydroxide (NaOH), or potassium hydroxide (KOH). A solution or powder de­rived from a substance containing alkali, used principally in soapmaking.