bidirectional

Synonyms

biface, bifacial

having two faces or fronts

duplex

allowing communication in opposite directions simultaneously

two-way

operating or permitting operation in either of two opposite directions

Antonyms:

unidirectional

operating or moving or allowing movement in one direction only

one-way

moving or permitting movement in one direction only

simplex

allowing communication in only one direction at a time, or in telegraphy allowing only one message over a line at a time

unifacial

having but one principal or specialized surface

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