palaeoichthyology
/ˌpalɪəʊˌɪkθɪˈɒlədʒi/ /ˌpeɪlɪəʊˌɪkθɪˈɒlədʒi/(also palaeichthyology, paleichthyology, paleoichthyology)
noun
The branch of palaeontology that deals with extinct and fossil fishes.
Origin
Late 19th century; earliest use found in Theodore Gill (1837–1914). From palaeo- + ichthyology.