noun Download 🔗Share A mammal that lays eggs and has a single urogenital and digestive orifice. Only the echidnas and platypuses are included in this group Examples : "While most mammals give birth to live young, the monotreme is unique because it lays eggs, like the platypus found in Australia. " animal biology organism nature physiology Chat with AIVocabulary GamePractice Reading
adjective Download 🔗Share (of a pollen grain) Having a single trema, or aperture. Examples : "The botanist noted the pollen grain's monotreme structure under the microscope, making it easily identifiable. " biology plant Chat with AIVocabulary GamePractice Reading