Definition of palaeornithological in English:
palaeornithological
adjective ˌpeɪlɪˌɔːnɪθəˈlɒdʒɪklˌpalɪˌɔːnɪθəˈlɒdʒɪkl
Of or relating to palaeornithology.
Origin
Early 20th century; earliest use found in The New English Dictionary. From palaeo- + ornithological, after palaeornithology.