| Answer | Crossword Clue |
|---|---|
| monotremes | MONOTREME, a primitive Australian egg-laying mammal, eg a duck-billed platypus |
| monotreme | a primitive Australian egg-laying mammal, eg a duck-billed platypus |
| platypi | a small carnivorous aquatic monotreme mammal (Ornithorhynchus anatinus) of eastern Australia and Tasmania that has a fleshy bill resembling that of a duck, dense fur, webbed feet, and a broad flattened tail called also duck-billed platypus |
