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Definition of echidna noun from the Oxford Advanced Learner's Dictionary

 

echidna

 noun
noun
BrE BrE//ɪˈkɪdnə//
 
; NAmE NAmE//ɪˈkɪdnə//
 
(also spiny anteater) Wild mammals
 
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an Australasian animal which has a long nose, sharp claws on its feet, and sharp spines on its body, and which eats insects See related entries: Wild mammals Word Origin mid 19th cent.: modern Latin, from Greek ekhidna ‘viper’, also the name of a mythical creature which gave birth to the Hydra (a snake with several heads, in ancient Greek mythology); compare with ekhinos ‘sea urchin, hedgehog’.
See the Oxford Advanced American Dictionary entry: echidna