from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A ridge or crest on an upper molar tooth of a horse or rhinoceros

from The Century Dictionary and Cyclopedia

  • n. The external ridge or crest on such an upper molar as that of a horse or rhinoceros. From it arise the parastyle, mesostyle, and metastyle. See cut under tooth.


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