英语词汇“key course”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	key course
释义	> as lemmas key course key course n. Building and Architecture (now rare) a course containing a keystone or consisting of keystones. ΚΠ 1700 Moxon's Mech. Exercises: Bricklayers-wks. 41 The middle of the Key-course will be the middle of the Arch. 1835 Penny Cycl. III. 485/2 A stone high up in the arch (for instance, a part of the key-course). 1977 C. M. Harris Hist. Archit. Sourcebk. 315/2 Key course, a course of keystones in an arch; used in a deep archway where a single keystone will not suffice. extracted from keyn.¹adj. < as lemmas
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> as lemmas