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Pronunciation: ad′ĕr

Definition: Common name for many members of the family Viperidae (the vipers), applied to several genera, although true adders are of the genus Vipera.

[M.E. naddre, fr. O.E. nāedre]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.