hornbook

hornbook
noun
  1. (historical)a teaching aid consisting of a leaf of paper showing the alphabet, and often the ten digits and the Lord's Prayer, mounted on a wooden tablet and protected by a thin plate of horn
    (史)角帖书(一种教具,包括裱在木板上的一张字母表,常伴有10个数字和主祷文,并用一层薄角质片保护)
    ■(Law, N. Amer.)a brief treatise summarizing important cases or legal points
    (律 北美)法学入门(书)(概括重要案件和法律要点的简单论从)
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