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A recording stylus with a sharpened tip that removes material to produce a groove in the recording medium.



Related Terms

FLASH GROOVE

  1. A groove in a casting die so that excess material can escape during casting. 2. See cutoff.

CONSTANT-VELOCITY RECORDING

A sound-recording method in which, for input signals of a given amplitude, the resulting recorded amplitude is inversely proportional to the frequency; the velocity of the cutting stylus is then constant for all input frequencies having that a design plan for material and equipment into a project ready for operation.

LATERAL RECORDING

[ENG ACOUS] A type of disk recording in which the groove modulation is parallel to the surface of the recording medium so that the cutting stylus moves from side to side during recording.

GROWN-JUNCTION PHOTOCELL

A photodiode consisting of a bar of semiconductor material having a pn junction at right angles to its length and an ohmic contact at each end of the bar.

CORAL REEF

A reef made up of coral, fragments of coral and other organisms, and the limestone resulting from their consolidation. Coral may constitute less than half of the reef material

NONDESTRUCTIVE EVALUATION

A technique for probing and sensing material structure and properties without causing damage (as opposed to revealing flaws and defects).

EXTRUDATE

Ductile metal, plastic, or other semisoft solid material that has been shaped into a continuous form (such as fiber, film, pipe, or wire coating) by forcing the semisolid material through a die opening of appropriate shape.

ELECTRIC HYGROMETER

An instrument for indicating by electrical means the humidity of the ambient atmosphere; usually based on the relation between the electric conductance of a film of hygroscopic material and its moisture content.

BABBITT

A soft, white, non-ferrous alloy bearing material composed principally of copper, antimony, tin and lead.

FILTER MEDIUM

The porous material that performs the actual process of filtration.

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