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monodirectional
monodirectional adj. 
/ˌmɒnə(ʊ)dʌɪˈrɛkʃən(ə)l/, /ˌmɒnə(ʊ)dᵻˈrɛkʃn̩(ə)l/, /ˌmɒnə(ʊ)dʌɪˈrɛkʃən(ə)l/, /ˌmɑnoʊˌdaɪˈrɛkʃ(ə)nəl/ = unidirectional adj.
Brit. /ˌmɒnə(ʊ)dᵻˈrɛkʃn̩(ə)l/
, /ˌmɒnə(ʊ)dᵻˈrɛkʃn̩(ə)l//ˌmɒnə(ʊ)dʌɪˈrɛkʃən(ə)l//ˌmɒnə(ʊ)dᵻˈrɛkʃn̩(ə)l//ˌmɒnə(ʊ)dʌɪˈrɛkʃən(ə)l/U.S. /ˌmɑnoʊdəˈrɛkʃ(ə)nəl/
, /ˌmɑnoʊdəˈrɛkʃ(ə)nəl//ˌmɑnoʊˌdaɪˈrɛkʃ(ə)nəl/ΘΚΠ
the world > space > direction > [adjective] > having one direction
one-way1824
unidirectional1883
one-directional1910
monodirectional1962
1962 Icarus 1 191 An integral equation for the scattering function for a finite, plane-parallel, inhomogeneous, nonemitting and anisotropically scattering atmosphere is derived in the case of time-dependent monodirectional illumination of the lower boundary.
1984 Dictionaries 6 173 If the dictionary is compiled for the benefit of only one of the speakers of the two languages, it is called ‘monodirectional’ or ‘unidirectional’.
1989 Brit. Med. Jrnl. 4 Feb. 305/1 A monodirectional breeze..might expose the bonfire maker to no carcinogens at all.
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