Definition of "marsupium" []

• An external pouch or fold on the abdomen of most female marsupials, containing the mammary glands and in which the young continue to develop after leaving the uterus. (noun)
• A temporary egg pouch in various fishes and crustaceans. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Copulation consists of the male wrapping the posterior part of his body around the female's ventral side, bringing his uropods in close proximity to her marsupium."
• "Females have a marsupium in which they brood their young until they are ready to be released into the environment."
• "After mating is complete, the female releases eggs into her marsupium where fertilization takes place."