1.
marsupials; marsupial mammals
A group of mammals whose young are born at a very early stage of development and continue to grow in a pouch on the mother's abdomen. Includes kangaroos, koalas, wombats, and opossums; mostly native to Australia and the Americas.
カンガルーは有袋類だ。
Kangaroos are marsupials.
有袋類の多くはオーストラリアに生息する。
Many marsupials live in Australia.
有袋類の母親は子を袋の中で育てる。
Marsupial mothers raise their young inside a pouch.
有袋類は胎盤が十分に発達しないため、子は未熟な状態で生まれてくる。
Because the placenta of marsupials does not develop fully, their young are born in an immature state.
Composed of 有 (having), 袋 (bag, here read as たい in on-reading) and 類 (group, kind, taxonomic category). A zoological classification term used in biology and nature writing.
USAGE:
- A plain technical noun; does not take する.
- The suffix 〜類 is used broadly in Japanese biology to form group names: 哺乳類 (mammals), 爬虫類 (reptiles), 鳥類 (birds).
COMMON COLLOCATIONS:
- 有袋類の動物: marsupial animals
- 有袋類に属する: to belong to the marsupials
- オーストラリアの}{有袋類: Australian marsupials
RELATED TERMS:
- 哺乳類: mammals — marsupials are a subgroup of mammals
- 有胎盤類: placental mammals — the contrasting group, with full placenta
- 単孔類: monotremes — egg-laying mammals (e.g., platypus)
- カンガルー: kangaroo — the best-known marsupial