Definition of "adder" []

• One that adds, especially a computational device that performs arithmetic addition. (noun)
• See viper. (noun)
• Any of several nonvenomous snakes, such as the milk snake of North America, popularly believed to be harmful. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The puff adder is a short, thick viper that is responsible for more bites than any other serpent in Africa."
• "(Then tell LiveJournal that their link adder is borked.)"
• "Ok.. my tag adder is updated for the restyled BlogThis!"