adder

Short definition from Wiktionary

Noun

1. 1
   Any snake.
2. 2
   A name loosely applied to various snakes more or less resembling a viper: A small venomous serpent of the genus Vipera
3. 3
   A small venomous serpent of the genus Vipera: A common European adder (Vipera berus).
4. 4
   A name loosely applied to various snakes more or less resembling a viper: A puff adders, of Africa (genus Bitis).
5. 5
   Any of several small nonvenomous snakes resembling adders: A milk snake (Lampropeltis triangulum).
6. 6
   Any of several small nonvenomous snakes resembling adders: A hog-nosed snake, of genus Heterodon of harmless colubrid snakes found in North America
7. 7
   Certain venomous snakes resembling other adders: Death adders (Acanthophis spp.), elapid snakes found in Southeast Asia and Australia
8. 8
   Certain venomous snakes resembling other adders: A northern copperhead (Agkistrodon contortrix mokasen), a venomous viper found in the eastern United States
9. 9
   A sea stickleback or adder fish (Spinachia spinachia).
10. 10
    Someone who or something which performs arithmetic addition; a machine for adding numbers.
11. 11
    An electronic device that adds voltages, currents or frequencies.
12. 12
    Something which adds or increases.
13. 13
    A person who has attention deficit disorder.