Adder

1. n. Same as Sea Adder.
2. n. One who, or that which, adds; esp., a machine for adding numbers.
3. n. A serpent.
4. 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.
5. n. In America, the term is commonly applied to several harmless snakes, as the milk adder, puffing adder, etc.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.