IPA: /ˈmɒnətriːm/
KK: /mɑˈnɑtrim/
A type of mammal that lays eggs instead of giving birth to live young, including species like the platypus and echidna, found mainly in Australia and New Guinea.
The platypus is a well-known monotreme that lays eggs instead of having live young.
Monotreme → It is formed from "mono-" (meaning single or one) and "trema" (from Greek "trēma", meaning hole or opening). The word "monotreme" refers to a group of egg-laying mammals that have a single opening for excretion and reproduction, hence the name meaning 'one hole'.
Think of 'mono-' meaning single and 'trema' referring to a hole — this helps you remember that a monotreme is an animal with a single opening for multiple functions.