adder(redirected from half adders)
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any of numerous venomous elapid and viperine snakes; the death adder is found in Australia and New Guinea and the puff adder is found in Africa and Arabia. See also snakebite.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Common name for many members of the family Viperidae (the vipers), applied to several genera, although true adders are of the genus Vipera.
[M.E. naddre, fr. O.E. nāedre]
Farlex Partner Medical Dictionary © Farlex 2012
1. Any of several venomous snakes, especially a viper of the subfamily Viperinae.
2. Any of several nonvenomous snakes, such as the hognose snake, often believed to be harmful.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.