What do a.m. and p.m. stand for?

speaking tube

a tube for conveying the voice over a somewhat limited distance, as from one part of a building or ship to another.
Origin of speaking tube
1825-35 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for speaking tube
  • One such convenience was a speaking tube running from the sergeant's desk to the head of the night driver's bed.
  • Several lengths of speaking tube, such as you find in apartment houses, were used in the radiator.
British Dictionary definitions for speaking tube

speaking tube

a tube or pipe for conveying a person's voice from one room, area, or building to another
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of the Day

Difficulty index for speaking tube

Few English speakers likely know this word

Word Value for speaking

Scrabble Words With Friends