Hoof (hoof) - hoof (English spelling)

Japanese: ひづめ(蹄) - ひづめ（英語表記）hoof

A sturdy shoe-like claw found in large herbivorous mammals, suitable for supporting heavy bodies and running long distances. Typical examples are seen in odd-toed ungulates such as horses, tapirs, and rhinoceroses, and even-toed ungulates such as cattle, antelopes, deer, giraffes, and wild boars, but elephants also have hooves. It is a variant of the hooked claws found at the end of the fingers of most mammals, in which the nail wall that makes up most of the nails of monkeys and humans surrounds the terminal segment of the finger and becomes cylindrical, with the bottom of the cylinder being covered by a developed sole, completely encasing the tip of the toe just like wearing a shoe.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

大型の草食哺乳類がもつがんじょうな靴状のつめで，重い体を支えて長距離を走るのに適している。典型的なものはウマ，バク，サイなどの奇蹄類，ウシ，カモシカ，シカ，キリン，イノシシなどの偶蹄類に見られるが，ゾウのつめもひづめである。一般の哺乳類の指端にある鉤（かぎ）づめの変わったもので，サルやヒトの扁（ひら）づめの大部分を占める爪壁（そうへき）が，指の端節を取り巻いて円筒状になり，その円筒の底を発達した爪底がふさいで，ちょうど靴をはいたように指の先を完全に包む。

出典　株式会社平凡社世界大百科事典第２版について　情報

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