From The Collaborative International Dictionary of English v.0.48 [gcide]:
From WordNet (r) 3.0 (2006) [wn]:
1: a mythical Greek hero of the Iliad; a foremost Greek warrior at the siege of Troy; when he was a baby his mother tried to make him immortal by bathing him in a magical river but the heel by which she held him remained vulnerable--his 'Achilles' heel'
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