from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A common name used of two species of rattlesnake having a diamond pattern on its back, i.e. Crotalus adamanteus found in the southeastern United States and Crotalus atrox found in southwestern United States and northwestern and central Mexico.
- n. The saltmarsh terrapin of the Atlantic coast (Malacoclemmys palustris).
diamond + back (Wiktionary)