educational（adj.）
1650年代，“由于教育”； 1830年，“与教育有关的”； 来自 education + -al（1）。意思是“旨在或服务于教育”，可追溯到1935年。相关： Educationally。
We do not, therefore, consider it any especial merit of a new dictionary, that it contains a large number of words which have not been in its predecessors. Whether those words are merely local or personal, as "equaled," introduced by Dr. Webster, on the usage of his own writing-desk, or such barbarisms as "conversationism" and "educational," tolerated by Dr. Worcester on the very poor authority of the Eclectic Review, they are only to be harbored as a sort of Japanese sailors, or of Kanackas, whom we send away from us as soon as we can. [review of Joseph E. Worcester's "Dictionary of the English Language," Christian Examiner, May 1860]
因此，我们不认为新词典包含许多以前没有出现过的单词是任何特别的优点。无论这些单词是仅限于地方或个人的，例如“equaled”，由韦伯斯特博士引入，用于他自己的写字台，还是像“conversationism”和“educational”这样的野蛮用语，由沃斯特博士在《选集评论》的非常不好的权威下容忍，它们只能被当作一种日本水手或卡纳卡人，我们会尽快把他们送走。[约瑟夫·E·沃斯特的《英语词典》评论，基督教审查杂志，1860年5月]
该词起源时间：1650年代