- one who adds
- ☆ an adding machine
- a computer circuit that performs addition
- a small, poisonous snake of Europe; common viper (Vipera berus)
- any of various other snakes, as the poisonous puff adder of Africa or the harmless milk snake of North America
Origin of adderMiddle English ; from nadder (by faulty separation of a nadder) ; from Old English nædre ; from Indo-European base an unverified form nətr, an unverified form nētr from source Classical Latin natrix, watersnake
- Any of several venomous snakes, especially a viper of the subfamily Viperinae.
- Any of several nonvenomous snakes, such as the hognose snake, often believed to be harmful.
Origin of adderMiddle English, from an addre, alteration of a naddre, a snake, from Old English n&aemac;dre, snake.
- A name loosely applied to various snakes more or less resembling the viper; a viper.
- (chiefly UK) A small venomous serpent of the genus Vipera. The common European adder is the Vipera berus. The puff adders of Africa are species of the genus Oecobius.
- (US, Canada) Any of several small nonvenomous snakes resembling the adder, such as the milk snake.
- The sea-stickleback or adder-fish.
From Middle English addere, misdivision of naddere, from Old English nǣdre, nǣddre (“snake, serpent, viper, adder”), from Proto-Germanic *nēdrǭ, *nadrǭ (“snake, viper”) (compare West Frisian njirre, Dutch adder, German Natter, Otter), from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *nh₁trih₂ (compare Welsh neidr, Latin natrīx ‘watersnake’), from *sneh₁- (“to spin, twist”) (compare Dutch naaien). More at needle.
adder - Computer Definition
An elementary electronic circuit that adds the bits of two numbers together.