| 单词 | rectangulometer | 
| 释义 | rectangulometern. rare.   An instrument used to determine whether an angle is a right angle. ΘΚΠ the world > relative properties > measurement > measuring instrument > 			[noun]		 > for measuring angles > right angles squarea1300 squire1382 rectangulometer1847 1847    C. Holtzapffel Turning & Mech. Manip. II. xxviii. 880  				When the work and trial-bar, (or rectangulometer), are both laid down, the one side of the bar presents a truly perpendicular face. 1968    I. Ehrlich Instant Vocab. 152  				Rectangulometer, instrument for measuring right angles. This entry has been updated (OED Third Edition, June 2009; most recently modified version published online March 2022). <  | 
	
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