adj.
Pronunciation: ˌ b ī -d ə - ' rek-shn ə l, -d ī -, -sh ə -n ə l
Function: adjective
Date: 1928
: involving, moving, or taking place in two usually opposite directions < bidirectional flow> < bidirectional replication of DNA>
– bi · di · rec · tion · al · ly adverb