Adder Definition

ădər
adders
noun
adders
One that adds, especially a computational device that performs arithmetic addition.
American Heritage
One who adds.
Webster's New World
An adding machine.
Webster's New World
A computer circuit that performs addition.
Webster's New World
A small, poisonous snake of Europe; common viper (Vipera berus)
Webster's New World
Synonyms:

Other Word Forms of Adder

Noun

Singular:
adder
Plural:
adders

Origin of Adder

  • 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.

    From Wiktionary

  • Middle English from an addre alteration of a naddre a snake from Old English nǣdre snake

    From American Heritage Dictionary of the English Language, 5th Edition

  • add + -er.

    From Wiktionary

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