metatherian

/M EH0 T AH0 TH IH1 R IY0 AH0 N/
noun
  1. 1

    A member of the infraclass Metatheria.

adjective
  1. 1

    Belonging or pertaining to the infraclass Metatheria of marsupials.

Source: https://en.wiktionary.org/wiki/metatherian