adjective.
Belonging or pertaining to the infraclass Metatheria of marsupials.
noun.
A member of the infraclass Metatheria.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
primitive pouched mammals found mainly in Australia and the Americas
Word Usage
"By integrating phylogenetics of novel vtg transcripts from old and modern teleosts with syntenic analyses of all available genomic variants of non-metatherian vertebrates we identify the gene orthologies between the Sarcopterygii (tetrapod branch) and Actinopterygii (fish branch)."