Learn how to say Monotremes correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word monotreme:
a primitive mammal that lays large yolky eggs and has a common opening for the urogenital and digestive systems. Monotremes are now restricted to Australia and New Guinea, and comprise the platypus and the echidnas.
Order Monotremata and subclass Prototheria: two families
mid 19th century: from mono- ‘single’ + Greek trēma ‘hole’