diamondback (plural diamondbacks)
- (common name) Either of two species of rattlesnake having a diamond pattern on the back: Crotalus adamanteus, found in the southeastern United States, and Crotalus atrox, found in the southwestern United States and northwestern and central Mexico.
- The saltmarsh terrapin of the Atlantic coast (Malacoclemmys palustris).
- (Crotalus adamanteus): eastern diamondback rattlesnake, common rattlesnake, Florida diamond-back, Florida rattlesnake, southeastern diamond-backed rattler, southern woodland rattler, water rattle, water rattlesnake
- (Crotalus atrox): western diamondback rattlesnake, adobe snake, Arizona diamond rattlesnake, coon tail, desert diamond-back, desert diamond rattlesnake, fierce rattlesnake, spitting rattlesnake, Texan rattlesnake, Texas diamond-back
rattlesnake with diamond pattern on its back