bi·di·rec·tion·al

[bahy-di-rek-shuh-nl, -dahy-]
adjective
capable of reacting or functioning in two, usually opposite, directions.

Origin:
1940–45; bi-1 + directional

bi·di·rec·tion·al·i·ty, noun
bi·di·rec·tion·al·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
bidirectional (ˌbaɪdɪˈrɛkʃənəl) [Click for IPA pronunciation guide]
 
adj
computing (of a printhead) capable of printing from left to right and from right to left

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Bidirectional is always a great word to know.
So is slumgullion. Does it mean:
a stew of meat, vegetables, potatoes, etc.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Etymonline
Word Origin & History

bidirectional
1941, from bi- + direction + -al (1). Originally of microphones.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
We looked at one such study of bidirectional ant traffic not so long ago.
The mixing could have been bidirectional, but the farmers were more likely to survive.
Where a bidirectional affiliation occurs, however, the label is inappropriate.
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