trigonometern.1
/trɪɡəˈnɒmɪtə/ A name given to various trigonometrical instruments.
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the world > relative properties > number > mathematical instruments > [noun] > trigonometrical instruments
scale of equal parts1630
plain scale1659
plane scale1709
trigonometer1767
the world > relative properties > measurement > measuring instrument > [noun] > for measuring angles
protractor1602
recipiangle1728
goniometer1766
trigonometer1767
repeating circle1799
angulometer1817
sine bar1915
1767 J. Ferguson Tables & Tracts (1771) 80 Mr. Mungo Murray..contrived a very useful instrument..which he calls The Armillary Trigonometer.
1796 C. Hutton Math. & Philos. Dict. Armillary Trigonometer, an instrument..consisting of five semicircles..so divided and graduated, as to serve for expeditiously resolving many problems in astronomy, dialling, and spherical trigonometry.
1828 Amer. Jrnl. Sc. 14 270 A trigonometer..which may be conveniently carried in the pocket.
1860 Brit. Patent 1793 (1861) 1 An improved mathematical or plotting instrument which I intend to denominate a protracting trigonometer.
This entry has not yet been fully updated (first published 1914; most recently modified version published online March 2018).
trigonometern.2
A person versed in trigonometry; spec. one engaged in a trigonometrical survey.
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the world > relative properties > number > geometry > [noun] > branches of > trigonometry > student of
trigonometera1852
trigonometrist1884
trigonometrician1900
a1852 W. Macgillivray Nat. Hist. Dee Side (1855) 92 We arrived at the centre of the broad top..seating ourselves on the base of the pyramidal cairn of the Trigonometers.
1902 Westm. Gaz. 10 Nov. 12/2 Kabru is..higher than Aconcagua—its height is,..according to the trigonometers, above 24,000 ft.
This entry has not yet been fully updated (first published 1914; most recently modified version published online June 2019).
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n.11767n.2a1852