platypus
Concise Oxford English Dictionary © 2008 Oxford University Press:
platypus /ˈplatɪpəs/ (also duck-billed platypus)
▶noun (pl. platypuses) a semiaquatic egg-laying Australian mammal with a sensitive pliable bill like that of a duck and webbed feet with venomous spurs. [Ornithorhynchus anatinus.]
– origin C18: mod. L., from Gk platupous ‘flat-footed’.
'platypus' also found in these Oxford entries:

