Neornithes
plural noun
Ne·or·ni·thes
| \ nēˈȯrnəˌthēz, ˌnēˌȯrˈnī(ˌ)thēz \
Definition of Neornithes
: a subclass of birds comprising all recent and fossil birds except the Archaeornithes
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Merriam-Webster unabridged
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