planometern.
/plaˈnɒmᵻtə/, /pləˈnɒmᵻtə/, U.S. /pləˈnɑmədər/ Mechanics and Engineering.
An accurately made flat plate used as a standard gauge for plane surfaces. Also: a tool attached to a lathe for producing a flat surface on a piece of work; a faceplate.
ΘΚΠ
the world > relative properties > measurement > measuring instrument > [noun] > for measuring flatness or roughness of surfaces
surface gauge1845
planometer1851
true plane1856
profilograph1880
profilometer1925
roughometer1926
1851 Times 16 Oct. 2/3 Planometer, a machine for measuring plane surfaces.
1854 J. C. E. Bourne Catech. Steam Engine 212 Face plates, or planometers, as they are sometimes termed, are supplied by most of the makers of engineering tools.
1869 W. J. M. Rankine Man. Machinery & Millwork 571 An existing standard plane surface (or planometer).
1875 E. H. Knight Amer. Mech. Dict. III. 1726/2 Plane-surfaces are produced by the planing-machine, by the file, and by grinding... For the purpose of verifying their accuracy, the planometer was devised by Whitworth.
1894 Manufacturer & Builder Nov. 264/1 We find..descriptive treatises on drawing instruments, planometers, etc.
1988 Jrnl. Commerce (Nexis) 31 May 11 b Supply and start-up of maintenance equipment for aircraft engines as: planometers. Handling material; metrology and calibration; machine-tools; industrial furnaces;..etc.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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n.1851