ADDER

I. noun Etymology: Middle English, alteration (by false division of a naddre) of naddre, from Old English nǣdre; akin to Old High German nātara ~, Latin natrix water snake Date: 14th century the common venomous viper ( Vipera berus ) of Europe, any of several North American snakes (as the hognose snakes) that are harmless but are popularly believed to be venomous, II. noun Date: 1580 one that adds