Definition of marsupium
1 : an abdominal pouch that is formed of a fold of the skin and encloses the mammary glands of most marsupials
2 : any of several structures in various invertebrates (as a bryozoan or mollusk) for enclosing or carrying eggs or young
Origin and Etymology of marsupium
New Latin, from Latin, purse, pouch, from Greek marsypion
First Known Use: 1698
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