Belonging or pertaining to the infraclass Metatheria of marsupials.(adjective)
A member of the infraclass Metatheria.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "metatherian" in a sentence
"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)."