bidirectional

[bahy-di-rek-shuh-nl, -dahy-]

Origin of bidirectional

First recorded in 1940–45; bi-1 + directional
Related formsbi·di·rec·tion·al·i·ty, nounbi·di·rec·tion·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for bidirectionally

bidirectional

adjective
  1. computing (of a printhead) capable of printing from left to right and from right to left
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

Word Origin and History for bidirectionally

bidirectional

adj.

also bi-directional, 1941, from bi- + direction + -al (1). Originally of microphones. Related: Bidirectionally.

Online Etymology Dictionary, © 2010 Douglas Harper