This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Belonging or pertaining to the infraclass Metatheria of marsupials.

n. A member of the infraclass Metatheria.

n. Any of a group of primitive pouched mammals found mainly in Australia and the Americas.

Pertaining to the Metatheria, or having their characters: as, a metatherian mammal; the metatherian type.

n. A member of the Metatheria.

n. primitive pouched mammals found mainly in Australia and the Americas

"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)."

mammalian    mammal   

pouched mammal    marsupial