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C

COVALENT BOND

A type of linkage between atoms in which the atoms share valence electrons [7].

CPR

Cardiopulmonary Resuscitation [1].

CREST (TOP)

The peak of the positive alternation (maximum value above the line) of a wave [10].

CRITICAL ANGLE

The maximum angle at which radio waves can be transmitted and still be refracted back to earth [10].


CRITICAL FREQUENCY

The maximum frequency at which a radio wave can be transmitted vertically
and still be refracted back to earth [10].


CROSS-SECTIONAL AREA

The area of a "slice" of an object. When applied to electrical conductors it
is usually expressed in circular mils [1].


CROSSED-FIELD AMPLIFIER

A high-power electron tube that converts dc to microwave power by a
combination of crossed electric and magnetic fields [18].


CROWN-OF-THORNS TUNER

See SPROCKET TUNER [11].

CRYSTAL

A natural substance, such as quartz or tourmaline, that is capable of producing a voltage when under physical stress or of producing physical movement when a voltage is applied [9].


CRYSTAL FURNACE

A device for artificially growing cylindrical crystals to be used in the production
of semiconductor substrates [14].



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