from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One that adds, especially a computational device that performs arithmetic addition.
- n. See viper.
- n. Any of several nonvenomous snakes, such as the milk snake of North America, popularly believed to be harmful.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A snake.
- n. A name loosely applied to various snakes more or less resembling the viper; a viper.
- n. 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.
- n. Any of several small nonvenomous snakes resembling the adder, such as the milk snake.
- n. The sea-stickleback or adder-fish.
- n. Someone who or something which performs arithmetic addition.
- n. Something which adds or increases.
from the GNU version of the Collaborative International Dictionary of English
- 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 berus or 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.
from The Century Dictionary and Cyclopedia
- n. The popular English name of the viper, Vipera communis, now Pelias berus, a common venomous serpent of Europe (and the only poisonous British reptile), belonging to the family Viperidæ, of the suborder Solenoglypha, of the order Ophidia.
- n. A name loosely applied to various snakes more or less resembling the viper, Pelias berus: as
- n. The sea-stickleback or adder-fish. See adder-fish.
- n. One who adds.
- n. An instrument for performing addition.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a machine that adds numbers
- n. a person who adds numbers
- n. small terrestrial viper common in northern Eurasia
Middle English, from an addre, alteration of a naddre, a snake, from Old English nǣdre, snake.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English addere, misdivision of naddere, from Old English nǣdre, nǣddre ("snake, serpent, viper, adder"), from Proto-Germanic *nēdrōn, *nadrōn (“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. (Wiktionary)
to add + -er. (Wiktionary)