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Y-AXIS

The lateral, or pitch, axis of an aircraft. Cf axis,

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Y-MAZE

A maze similar to a y-maze, but in which the arms are not at right angles to the stem.

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Y-NETWORK

Same asT-network; three-branch star network.

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Y-PARAMETER

The short-circuit admittance parameter of a transistor.

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Y-PLATES

Pair of electrodes to which voltage producing vertical deflection of spot is applied in accordance with cartesian co-ordinate system.

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Y/B RATIO

A term used to classify a type of dichromatism. An observer sees only two colours when examining the solar spectrum, blue and yellow, separated by a white patch. The relative extent of the two colours is the Y/B ratio.

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YAGI ANTENNA

An end-fire array, characterized by directors in front of the normal dipole radiator and rear reflector.

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YAPP

A style of binding with overlapping limp covers, much used for pocket bibles to protect the fore-edges,

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YARD

Unit of length in the foot-pound-second system formerly fixed by a line standard Weights and Measures Act of 1878, redefined in 1963 as 0-9144 m.

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YARDAGE

The volume of excavation in cubic yards,

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