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

piano roll

a roll of paper containing perforations such that air passing through them actuates the keys of a player piano.
Origin of piano roll
1925-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for piano roll
  • These pedal actions were marked on the piano roll with special punches.
  • In fact, the hottest technology for getting music into the home was the piano roll.
British Dictionary definitions for piano roll

piano roll

a perforated roll of paper actuating the playing mechanism of a Pianola Also called music roll
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 piano roll

Few English speakers likely know this word

Word Value for piano

Scrabble Words With Friends

Nearby words for piano roll