pterotic
/təˈrəʊtɪk/ /təˈrɒtɪk/Zoology
noun
A bone in the upper posterior part of the skull in many fishes and some other lower vertebrates, often bearing a distinct crest or flange; a corresponding element in the wall of the auditory capsule in some other vertebrate groups.
adjective
Designating, relating to, or corresponding to this bone or element.
Origin
Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From ancient Greek πτερόν wing + otic, after e.g. periotic, periotic.