polymyodian
/ˌpɒlɪmʌɪˈəʊdɪən/Ornithology rare (now historical )
adjective
Of a bird: having a syrinx with several distinct muscles; specifically (in Müller's scheme) belonging to the division Polymyodi of passerine birds, nearly corresponding to the suborder Oscines (the songbirds).
Origin
Mid 19th century; earliest use found in Proceedings of the Zoological Society of London. From scientific Latin Polymyodi, former group name + -an.