Decarburizalion to Delta L1 O.

Decarburization. The removal of car­bon from combination with metals as in the process of manufature of malleable iron.
Decastyle. (Arch.) A portico having ten columns.
Decay. (Wood) Disintegration of wood substance due to action of wood­destroying fungi. Also known as dote and rot.
Decelerometer. (Auto.) A device for recording the rate of deceleration of a moving car and to indicate the stopping ability of the brakes.
Decibet A unit for measuring sound intensity, named in honour of Alex­ander Grahm Bell. When sound Or noise is created it gives off energy which is measured in decibels; e.g.; the noise of an airplane engine measures 120 decibels.
Deciduous. Pertaining to those trees which shed their leaves at specific seasons.
Decimal. A method of expressing frac­tional parts by tenths, hundredths, etc.
Decimal equivalent. The value of a fraction expressed as a decimal.
Decking. (Arch.) Material used to pro­tect, from the weather, any flat sur­face such as the deck of a boat, the flat roof or the floor of a porch. Such decking may be of wood, canvas, or some roofing material.
Deckle. (Papermkg.) In making paper by hand, the frame which regulates the size of the sheet. In making paper by machine, the straps which regu­late the width of the web and pre­vent the overflow of water soaked fiber. Also used as a term referring to the width of a web of paper which can be made on a paper­making machine.
Deckle edge. (Papermkg.) The rough feathery edge of handmade paper. Some machine-made paper also has deckle edges.
Decoder. In 4-channel, a circuit or circuit complex which translates matrix encoded signals arriving in the form of two separate signals into four signals to be amplified and passed on to the speaker sys­tems.
Decomposition. The act, process, or result of decomposing by natural decay or by chemical action.
Decoration. (Furn.) The ornamen­tation of furniture, such as carv­ing, painting, inlaying, applying of mouldings, mounts, upholstery, etc.
Decoupling. Use of capacitors and other components of decouple separate stages in an amplifier or tuner-and to isolate such stages from HT supply-at audio and in­frasonic frequencies. Also, mc­chanical decoupling. by means of compliance in turntable, cartridges and loudspeakers, or between cabi­nete; and rooms to overcome acous­tic feedback.
'Dedendum. (Gear.) That pori ion of a gear tooth lying between the pilch and the root lines.
Deeping. (Cab wk.) Cutting out a depth; placing comparatively far below the surrounding surface. .
Defacement. (Wood Parmkg.) The

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Defect. A flaw or imperfection. Definition. (Tel.) Sharpness of detail in the reconstructed picture.
. Deflection. The bending of a beam or structure under an applied load. (Tel.) The movement of the electron beam in a picture or camera tube by means of electrostatic or magnetic fields.
Deflection circuit. A complete set of deflection coils consistings of one to control vertical scanning and another to control horizontal scan­ning; also, electronics used to power a deflection system.
Deflection coil. An electromagnetic coil wound around the cathode end of the cathode ray tube to produce a magnetic field which controls the movement of the electron beam.
Defluxer. Device for removing re­sidual magnetism from tape-heads and tape-deck fittings, or for eras­ing Tecording from short stretches of tape. Works by applying an alter­nating magnetic field. Some "so­called" defluxers are no more than 2 magnets which, while erasing the audio recording, leave an unaccept­able noise level, on the tape.
Deformation. The alteration in form which a structure undergoes when subjected to the action of a load.
D~formed bars. (ElIgin.) Those rein­forcing bars made in irregular shapes to produce better bond between the bars and the concrete.
Degrades. (Wood) Pieces which on reinspeclion, prove of lower quality than the grade in which they were shipped.
Degras. The grease obtained in scour­ing wool. It is used in increase the viscosity of lubricants, also in belt dressings.
Degree. A 360th part of the circum­ fe-rence of a circle.

Dehumidifying. The lessening of the moisture content of the air, as in some industrial plants where dry air is required in certain manufac­turing processes.
Deicer. (Aero.) Any of the devices used to free wings, tail, and propel­lers from ice which sometimes forms in flight.
Delaminate. (Plast.) To split a lami­nated plastic material along the plane of its layers.
Delay. This is in reference to an elec­tronic means of slowing down the arival of a signal via either analog or digital technology. Predea.ly is a parameter included on m~ny dig­ital reverbs, it introduces a space between the direct original signal hitting the reverb electronics.
Delete. A proofreader's mark, mean­
ing to remove or take out.
Deliquerceuce. The act or process of becoming liquid by absorption of moisture from the air, as certain salts; e.g., calcium chloride.
Delta L1 O. The fourth letter of the
Greek alphabet