monorhinaladj.
/ˌmɒnə(ʊ)ˈrʌɪnl/, U.S. /ˌmɑnəˈraɪn(ə)l/ 1. Zoology. Having a single central nasal passage, as characteristic of some agnathan vertebrates; = monorhine adj.
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the world > animals > fish > superclass Agnatha > [adjective] > Cyclostomatous > having single nasal passage
monorhinal1890
monorhine1890
monorhinous1902
1890 Cent. Dict. Monorhinal, Having the nostril single; monorhine.
1898 A. S. Woodward Outl. Vertebr. Palaeontol. 1 One of them seems to be clearly monorhinal, though with a calcified skeleton.
1900 Nature 20 Sept. 504/2 There is no evidence whatever that any of the creatures classed together as Ostracodermi were monorhinal like the Lampreys.
1968 Q. Rev. Biol. 43 69/1 He follows in general Stensiö's classification, although not following him in his claim that the Heterostraci are monorhinal.
1979 M. W. Hardisty Biol. Cyclostomes iii. 28 Kiaer..suggested that..in the cephalaspids and anaspids, as well as in living cyclostomes only a single ‘nasal’ opening is present (monorhinal).
2. Physiology. Involving or relating to the use of only one nostril.
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1936 Science 28 Feb. 212/2 The effect of bilateral stimulation upon monorhinal acuity of smell.
1986 Neurophysiology 18 48 During monorhinal breathing this activity..can only be recorded ipsilaterally.
1997 Arch. Neurol. (Chicago) 54 162/1 Subjects underwent evaluation for olfactory quality discrimination (OD) and delayed recognition memory (OM)... The presentations were monorhinal in the OD and birhinal in the OM tests.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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adj.1890