Having a common axis; sharing the same center line. Typically refers to a type of electrical cable with an inner conductor surrounded by insulation and an outer conductor.
From Latin 'co-' meaning together and 'axis,' literally meaning 'sharing an axis.' Coined in the early 20th century to describe cable design where inner and outer conductors share the same central axis.
Coaxial cable's ingenious design creates a 'electromagnetic highway' where the signal travels in the space between conductors, protected from interference like a message in a bottle floating down a stream. This same principle that brings cable TV to homes was originally developed to carry telephone calls across continents and oceans.
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