bidirectionaladj.

Etymology: bi- comb. form.Previous versions of the OED give the stress as: ˌbidiˈrectional.

Functioning in two directions; spec. of a microphone (see quot. 1962¹).

ΘΚΠ

the world > space > direction > [adjective] > two

bidirectional1941

1941 A. E. Craig Speech Arts (ed. 2) xxxix. 509 A bidirectional microphone, with the speech directed into either, or both, the openings or faces, is the kind deemed best for the production of radio plays.

1960 Aerodrome Lighting (B.S.I.) 29 Light fittings..may be bi-directional or uni-directional according to whether they are to cover both directions of landing and take off or not.

1962 A. Nisbett Technique Sound Studio 243 Bi-directional microphone, one which is live on the front face and back, but which is dead at the sides and above and below.

1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors xvi. 384 A bi~directional switch using four silicon junction diodes.

Derivatives

ˌbidiˈrectionally adv.

ΘΚΠ

the world > space > direction > [adverb] > in one or two direction(s)

unidirectionally1958

bidirectionally1966

1966 Jrnl. Compar. Neurol. 127 71/1 The rate of flow may be as high as 30–70 mm per day, streaming bidirectionally.

1973 Nature 26 Oct. 459/2 These findings are consistent with the Yin Yang hypothesis that the two cyclic nucleotides have opposing actions in bidirectionally controlled systems.

1984 Freetime Autumn 49/2 I liked the versatility it offers: lots of features and the ability to print text bi-directionally.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2019).

单词	bidirectional
释义	bidirectionaladj. Etymology: bi- comb. form.Previous versions of the OED give the stress as: ˌbidiˈrectional. Functioning in two directions; spec. of a microphone (see quot. 1962¹). ΘΚΠ the world > space > direction > [adjective] > two bidirectional1941 1941 A. E. Craig Speech Arts (ed. 2) xxxix. 509 A bidirectional microphone, with the speech directed into either, or both, the openings or faces, is the kind deemed best for the production of radio plays. 1960 Aerodrome Lighting (B.S.I.) 29 Light fittings..may be bi-directional or uni-directional according to whether they are to cover both directions of landing and take off or not. 1962 A. Nisbett Technique Sound Studio 243 Bi-directional microphone, one which is live on the front face and back, but which is dead at the sides and above and below. 1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors xvi. 384 A bi~directional switch using four silicon junction diodes. Derivatives ˌbidiˈrectionally adv. ΘΚΠ the world > space > direction > [adverb] > in one or two direction(s) unidirectionally1958 bidirectionally1966 1966 Jrnl. Compar. Neurol. 127 71/1 The rate of flow may be as high as 30–70 mm per day, streaming bidirectionally. 1973 Nature 26 Oct. 459/2 These findings are consistent with the Yin Yang hypothesis that the two cyclic nucleotides have opposing actions in bidirectionally controlled systems. 1984 Freetime Autumn 49/2 I liked the versatility it offers: lots of features and the ability to print text bi-directionally. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2019). < adj.1941
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