orthid
/ˈɔːθɪd/Palaeontology
noun
A fossil articulate brachiopod of the genus Orthis, family Orthidae, or order Orthida, of the Palaeozoic era.
adjective
Of or relating to the family Orthidae or order Orthida of fossil brachiopods.
Origin
Mid 19th century; earliest use found in Smithsonian Institution Annual Reports. From scientific Latin Orthidae, family name from Orthis, genus name + -idae.