hornbook
/ˈhɔːnbʊk/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）。
1.1
- Law, N. Amer. a brief treatise summarizing important cases or legal points【律】〈北美〉法律概要（概括重要案件和法律要点的小书）。