Speaking Tube Definition
noun
A tube or pipe made to carry the voice, as from one part of a building or ship to another.
Webster's New World
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
Wiktionary
Other Word Forms of Speaking Tube
Noun
Singular:
speaking tube
Plural:
speaking tubes
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