dyslexia（n.）
“由于大脑状况而导致阅读困难”，1885年，源自德语 dyslexie（1883年），来自希腊语 dys- “坏的，异常的，困难的”（参见 dys-）+ lexis “单词”（被视为“阅读”），来自 legein “说话”（来自 PIE 词根 *leg-（1）“收集，聚集”，具有“说话（‘挑选单词’）”的派生词义）+抽象名词后缀 -ia。Dyslexic（n.）于1946年记录； dyslectic（adj.）于1962年记录。
Professor Berlin has written a very interesting monograph upon the disease called dyslexia, which he believes allied to the alexia, or word-blindness of Kussmaul. He gives a clinical history of six cases, collected during a period of twenty-three years, all having this peculiarity, that they could read aloud the average type, Jaeger three to five, only a few words in succession. These words were correctly spoken and without confusion or stammering, but as soon as a few words had been read the patients seemed anxious to get rid of the book, and, on being questioned, stated that they had an unpleasant feeling which they could not well define. [The Satellite of the Annual of the Universal Medical Sciences, Philadelphia, November 1887]
柏林教授写了一篇非常有趣的专题论文，论述了一种称为“阅读障碍症”的疾病，他认为这种疾病与库斯莫尔的“词盲症”有关。他提供了23年间收集的六个病例的临床史，所有这些病例都有一个特点，即他们只能连续朗读平均字体，Jaeger 三到五个单词。这些单词被正确地说出来，没有混淆或口吃，但是一旦读了几个单词，病人似乎就急于摆脱书本，并且在被问及时，他们表示有一种无法很好地定义的不愉快感。[《普及医学年鉴》卫生部卫生局卫生处，费城，1887年11月]
该词起源时间：1885年