One of the mysteries of the English language finally explained.
Of a bird: having a syrinx whose muscles are attached to the middle of the bronchial semi-rings; specifically (in Garrod's scheme) belonging to the division Mesomyodi of passerine birds, closely corresponding to the suborder Deutero-Oscines (the suboscine passerines).
Late 19th century. From scientific Latin Mesomyodi, former group name + -an.
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