bidirectional

adjectives

reactive or functioning or allowing movement in two usually opposite directions
bidirectional
antonym
unidirectional
is similar to
having two faces or fronts
"the Roman Janus is bifacial"
biface, bifacial
is similar to
allowing communication in opposite directions simultaneously
"duplex system"; "duplex telephony"
duplex
is similar to
operating or permitting operation in either of two opposite directions
"a two-way valve"; "two-way traffic"; "two-way streets"
two-way