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echidna

[ih-kid-nuh] /ɪˈkɪd nə/
noun
1.
Also called spiny anteater. any of several insectivorous monotremes of the genera Tachyglossus, of Australia, Tasmania, and New Guinea, and Zaglossus, of New Guinea, that have claws and a slender snout and are covered with coarse hair and long spines.
Origin of echidna
< New Latin (1798), originally a genus name; Latin: serpent, Echidna a mythical creature which gave birth to the Hydra and other monsters < Greek échidna, akin to échis viper
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for echidna

echidna

/ɪˈkɪdnə/
noun (pl) -nas, -nae (-niː)
1.
any of the spine-covered monotreme mammals of the genera Tachyglossus of Australia and Zaglossus of New Guinea: family Tachyglossidae. They have a long snout and claws for hunting ants and termites Also called spiny anteater
Word Origin
C19: from New Latin, from Latin: viper, from Greek ekhidna
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for echidna
n.

Australian egg-laying hedgehog-like mammal, 1847, usually explained as from Greek ekhidna "snake, viper," from ekhis "snake," from PIE *angwhi- "snake, eel" (cf. Norwegian igle, Old High German egala, German Egel "leech," Latin anguis "serpent, snake").

But this sense is difficult to reconcile with this animal (unless it is a reference to the ant-eating tongue), and the name seems more properly to belong to Latin echinus, Greek ekhinos "sea-urchin," originally "hedgehog" (in Greek also "sharp points"), which Watkins explains as "snake-eater," from ekhis "snake."

Online Etymology Dictionary, © 2010 Douglas Harper
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