pit viper

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viper

 [vi´per]
1. any snake of the viperid and crotalid families (the true vipers and the pit vipers).
2. a term sometimes used to refer to any venomous snake.
Old World viper true viper.
pit viper any of a family of venomous snakes found in North America including the many types of rattlesnakes (genera Crotalus and Sistrurus), as well as the copperheads and water moccasins (both of genus Agkistrodon).
Russell's viper Vipera russellii, a true viper of Southeast Asia whose venom (Russell's viper venom) is used in blood tests.
true viper any of a large family of venomous snakes found in Africa, parts of Europe, Asia, and adjacent islands, but not in the Americas or Australia; it includes cobras and adders, among others. Called also Old World viper, viperid, and viperine.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pit viper

n.
Any of various venomous snakes of the subfamily Crotalinae, such as the copperhead, rattlesnake, or fer-de-lance, characterized by a small sensory pit below each eye.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
The bite of most pit vipers is called "hemotoxic," meaning that its venom disrupts the integrity of blood vessels.
Snake bite: pit vipers. Clin Tech Small Anim Pract.
Deinagkistrodon acutus, formerly Agkistrodon acutus, is a venomous pit viper found in Southeast Asia and known by many names: the Chinese moccasin, the sharp-nosed viper, the snorkel viper and the "hundred-pace viper" ("hundred-pacer").
These figures indicate that with an assumed dosage of 5 vials per envenomed victim, based on dosages of an existing monovalent anti snake venom for the Malayan pit viper (Callesolasma rhodostoma) and Russell's viper (Daboia siamensis), a total South East Asian Polyvalent anti snake venom requirement would be approximately 400,000 vials per annum.
The western cottonmouth, Agkistrodon piscivorus leucostoma, is an iteroparous pit viper that inhabits a wide variety of habitats (Gloyd and Conant, 1990; Werler and Dixon, 2000).
Compared to pit vipers, coral snakes are relatively small--usually no more than 2 feet long--and mild-mannered.
These signals are likely to render a calling frog conspicuous to visually-oriented predators, though only two species of pit vipers and a colubrid snake species are recorded as preying on these frogs (Hartmann et al.
Luckily, the copperhead is the least dangerous of the pit vipers, and many patients bitten by them may not need antivenin therapy.
For example, pit vipers possess incredible heat-detecting capabilities that are much more sensitive than anything we can do without the need for cryogenic cooling.
The ground was wet with sticky mud, while overhead long vines hung struggling to touch the Earthen floor where pit vipers thrived in the night.
The Joseph B Slowinski award - in memory of a venom expert who died after a snake bite in 2001 - has been presented to Simon Creer for his work on the venoms of Asian pit vipers.