←

monotreme

noun
🔊/ˈmɒnətriːm/
🔊/ˈmɑːnətriːm/
 (specialist)
jump to other results
  1. a class of animal including the echidna and the platypus, that lays eggs, but also gives milk to its babies单孔目动物（卵生哺乳动物）Topics Animalsc2
    Word Originmid 19th cent.: from mono- ‘single’ + Greek trēma ‘hole’.