Noun Adder Definition and Examples







A small venomous Eurasian snake which has a dark zigzag pattern on its back and bears live young. It is the only poisonous snake in Britain.
  1. 'The most interesting part was when the lecturer talked about a character called William Bunting, who used to catch wild adders to feed to the mongooses at London Zoo.'
  2. 'Along with the loss of heather and cottongrass, birds such as the nightjar, woodlark and stone curlew and animals including the adder, grass snake, and viviparous lizard have been put at risk.'
  3. 'The ‘horns’ of his horned adder, resembling a stunning set of false eyelashes, would have drag queens running for cover.'


A unit which adds together two input variables. A full adder can add a bit carried from another addition as well as the two inputs, whereas a half adder can only add the inputs together.
  1. 'It measures time by what Hillis calls a serial-bit adder, a highly accurate binary digital-mechanical system he invented.'
  2. 'Further, a semiconductor integrated circuit has a dither pattern generator, an adder, and an error distribution unit.'
((n.) One who, or that which, adds; esp., a machine for adding numbers.|--|(n.) A serpent.|--|(n.) A small venomous serpent of the genus Vipera. The common European adder is the Vipera (/ Pelias) berus. The puff adders of Africa are species of Clotho.|--|(n.) In America, the term is commonly applied to several harmless snakes, as the milk adder, puffing adder, etc.|--|(n.) Same as Sea Adder.|--|)


1. the common European viper, Vipera berus.

2. any of various other venomous or harmless snakes resembling the viper.


"There can be adder results."
"There can be adder outputs."
"There can be adder erms."
"There can be adder colonies."
"adders can be to southerners."
"adders can be to people."
"appetites can have adders."
"adders can be in deserts."
"adders can be for phases."

Old English nædre ‘serpent, adder’, of Germanic origin; related to Dutch adder and German Natter. The initial n was lost in Middle English by wrong division of a naddre; compare with apron, auger, and umpire.

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