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common name for a rattlesnakerattlesnake,
poisonous New World snake of the pit viper family, distinguished by a rattle at the end of the tail. The head is triangular, being widened at the base. The rattle is a series of dried, hollow segments of skin, which, when shaken, make a whirring sound.
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, Crotalus cerastes, found in the deserts of the SW United States. This 2-ft (60-cm), pale yellow and pink snake is named for its curious method of locomotion. It throws out successive loops at oblique angles, which gives it the appearance of moving sideways. This mode of progression, also evolved by certain African desert snakes, enables it to move over sand, which offers little traction. The sidewinder has prominent, erect scales above its eyes and is sometimes known as the horned rattlesnake. During the heat of the day it lies half buried in the sand; it hunts small animals in the evening. The sidewinder is classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Reptilia, order Squamata, family Crotalidae.


A Navy air-to-air missile having infrared homing guidance and a speed of over Mach 2; when launched from an airplane, the missile seeks and hits an enemy bomber or fighter target by homing on the heat emitted by the target.
References in periodicals archive ?
Joan was using a 12ft leger rod with a side-winder bait indicator, an open ended swim-feeder packed with brown crumb and bait samples and seven red maggots on a size 14s hook.
Side-winder Steve Lovell buries the spot kick to clinch the win; Neil in the coffin: David Lilley hauls Neil Barrett down in the box for a stonewall penalty that wrecked Killie's chances
They jogged across the tarmac to their aircraft - Mirage Dagger fighter jets, armed with cannon and side-winder missiles, and Skyhawk bombers, each carrying six 500lb bombs.