ostariophysan
/ɒˌstɛːrɪə(ʊ)ˈfʌɪs(ə)n/Ichthyol.
noun
A fish of the superorder Ostariophysi which includes the majority of freshwater fishes, and is characterized by the presence of the Weberian apparatus (connecting the air bladder with the inner ear).
adjective
Of, relating to, or designating (fishes of) the superorder Ostariophysi.
Origin
Early 20th century; earliest use found in Science. From scientific Latin Ostariophysi, superorder name (from German Ostariophysen from Hellenistic Greek ὀστάριον small bone (from the stem of ancient Greek ὀστέον bone + -άριον, extended form of -ιον, diminutive suffix) + ancient Greek ϕῦσα pair of bellows, in Hellenistic Greek also bladder: see physa) + -an.