marsupial

American  

[mahr-soo-pee-uhl] / mɑrˈsu pi əl /

noun

marsupials plural

1. any viviparous, nonplacental mammal of the order Marsupialia, comprising the opossums, kangaroos, wombats, and bandicoots, the females of most species having a marsupium containing the mammary glands and serving as a receptacle for the young.

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adjective

1. pertaining to, resembling, or having a marsupium.

2. of or relating to the marsupials.

marsupial British  

/ mɑːˈsjuːpɪəl, -ˈsuː-, -ˌsuː-, mɑːˌsjuːpɪˈeɪlɪən /

noun

1. any mammal of the order Marsupialia, in which the young are born in an immature state and continue development in the marsupium. The order occurs mainly in Australia and South and Central America and includes the opossums, bandicoots, koala, wombats, and kangaroos

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adjective

1. of, relating to, or belonging to the Marsupialia

2. of or relating to a marsupium

marsupial Scientific  

/ mär-so̅o̅′pē-əl /

1. Any of various mammals of the order Marsupialia, whose young are very undeveloped when born and continue developing outside their mother's body attached to one of her nipples. Most marsupials have longer hindlegs than forelimbs, and the females usually have pouches in which they carry their young. Kangaroos, opossums, and koalas are marsupials.

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Other Word Forms

Derived Forms

• marsupialian
  noun

Inflected Forms

Nouns

• marsupials
  plural

Etymology

Origin of marsupial

First recorded in 1690–1700, marsupial is from the New Latin word marsupiālis pertaining to a pouch. See marsupium, -al ¹

Compare meaning

How does marsupial compare to similar and commonly confused words? Explore the most common comparisons:

• marsupial vs. mammal

Explanation

Like primates, marsupials are a type of mammal. One thing all members of this family have in common is a pouch. The most famous marsupial is the kangaroo, but there are many others, such as wallabies, opossums, koalas, and wombats. What makes marsupials different from primates or rodents (who are also mammals) is that the mothers have pouches to hold their young. This is because when marsupial babies are born, they're not quite ready for the world, so the pouch gives them a chance to grow and be safe before having to live on their own. When you think marsupial, think "pouch."

Example Sentences

See Examples For:

marsupial marsupials

Instead, the teeth resembled those of Djarthia murgonensis, an extinct marsupial that lived about 35 million years earlier and is often viewed as a prototype for Australian marsupials.

From Science Daily ● Jul. 19, 2026

That possibility challenges the simpler version of marsupial evolution, in which one ancestral group gave rise to the full diversity of Australian marsupials.

From Science Daily ● Jul. 19, 2026

The numbat, a small Australian marsupial once reduced to just a few hundred animals, is making a remarkable comeback thanks to decades of conservation work.

From BBC ● Jul. 9, 2026

Costing A$136,000, the artwork represents a mythical megafauna, with the sculpture's designers inspired by an ancient marsupial ant-eater found in local caves that was "massive, lumbering and fascinating".

From BBC ● Mar. 25, 2026

“You are a marsupial, and are nocturnal, and are known for mimicking the appearance and smell of dead animals when threatened.”

From "The Wild Robot" by Peter Brown

According to Dr. Churchill, early members of Keeunamorphia may have appeared not long after the first marsupials arrived in Australia from Antarctica around 55 million years ago.

From Science Daily ● Jul. 19, 2026

Yet despite their success, scientists still do not fully understand how marsupials diversified across Australia.

From Science Daily ● Jul. 19, 2026

"Whatever these things were, they seemed to be primitive compared to other marsupials at the time, and they seem to have been doing their own thing and surviving well enough alongside them," says Dr. Churchill.

From Science Daily ● Jul. 19, 2026

In fact, some marsupials lose the Y early in development, and in mammals the chromosome has been shrinking for about 150 million years.

From Science Daily ● Mar. 20, 2026

He said hornets better represent the Merryweather spirit than foreign marsupials, plus the Wombat mascot costume was going to suck money from the prom committee’s budget.

From "Speak" by Laurie Halse Anderson