manometerTo calculate pressure in aU-tube manometer, add the sum of the readings above and below zero. The manometer on the right shows a reading of 4.ma·nom·e·ter (m?-n?m??-t?r)n.1. An instrument used for measuring the pressure of liquids and gases.2. A sphygmomanometer.[Greek manos, sparse; see men- in Indo-European roots + -meter.]man?o·met?ric (m?n??-m?t?r?k), man?o·met?ri·cal adj.man?o·met?ri·cal·ly adv.ma·nom?e·try n.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.manometer (m??n?m?t?) n (General Physics) an instrument for comparing pressures; typically a glass U-tube containing mercury, in which pressure is indicated by the difference in levels in the two arms of the tube[C18: from French manomètre, from Greek manos sparse + metron measure] manometric, ?mano?metrical adj ?mano?metrically adv ma?nometry nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014ma?nom?e?ter (m??n?m ? t?r) n. an instrument for measuring the pressure of a fluid, consisting of a tube filled with a liquid, the level of the liquid being determined by the fluid pressure. [1725?30;