pit viper

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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.

pit viper

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.

pit viper

Etymology: AS, pytt + L, vipera, snake
any one of a family of venomous snakes found in the Western Hemisphere and Asia, characterized by a heat-sensitive pit between the eye and nostril on each side of the head and hollow perforated fangs that are usually folded back in the roof of the mouth. With the exception of coral snakes, all indigenous poisonous snakes in the United States are pit vipers. See also copperhead, cottonmouth, rattlesnake.
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Pit viper


1. a hollow fovea or indentation.
2. a pockmark.
3. to indent, or to become and remain for a few minutes indented, by pressure.
4. seed of a fruit, e.g. cherry. Strictly refers to the hard woody coating which surrounds the seed.

anal pit
the proctodeum of the embryo.
auditory pit
a distinct depression in each auditory placode, marking the beginning of the embryonic development of the internal ear.
pit bull
a term used in describing various types of dogs used in past times for fighting in pits. Now, usually refers to the specific breed, american pit bull terrier.
lens pit
a pitlike depression in the fetal head where the lens develops.
nasal pit
a depression appearing in the olfactory placodes in the early stages of development of the nose. Called also olfactory pit.
olfactory pit
see nasal pit (above).
otic pit
early stage in the development of the embryonic inner ear.
pit pony
pony used in a mine to haul mined rock. Breed varies as long as it is small, e.g. Shetland pony.
pit of stomach
the epigastric fossa or epigastric region.
pit viper
see viper.
References in periodicals archive ?
Antivipmyn[R], an equine serum manufactured by Bioclon Institute in Mexico, is considered highly effective against North American pit vipers, but repeated doses may be needed.
During routine training in a wooded area on Marine Corps Air Station Cherry Point, North Carolina, on December 5, 2011, military working dog (MWD) Dingo M063 was bitten by a pit viper on the left front limb.
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").
Effects of green pit viper (Trimeresurus erythrurus and Trimeresurus popeorum) venoms on blood coagulation, platelets and the fibrinolytic enzyme systems: studies in vivo and in vitro.
In a later stomach content analysis performed by opening the stomach and intestines of this pit viper specimen, an undigested Porthidium lansbergii (Schlegel, 1841) neonate (ANDES-R 171), with a total length of 180 mm, was found (Fig.
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.
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.