argandn.
/ˈɑːɡand/ 1. Applied to a lamp invented by Aimé Argand about 1782, with a cylindrical wick, which allows a current of air to pass to both inner and outer surfaces of the flame, thus securing more perfect combustion and brighter light; also to a ring-shaped gas burner constructed on the same principle.
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the world > matter > light > artificial light > an artificial light > artificial light defined by light-source > [noun] > oil-lamp > argand lamp
argand1790
solar lamp1841
1790 W. Roy in Philos. Trans. (Royal Soc.) 80 162 A simple Argand's burner.
1805 Sir H. Davy in Philos. Trans. (Royal Soc.) 95 158 Exposed to the heat of an Argand lamp.
1832 C. Babbage Econ. Machinery & Manuf. (ed. 3) xxiv. 237 An argand burner, whether used for consuming oil or gas.
1833 M. Scott Tom Cringle's Log I. ii. 51 A large argand with a brilliant reflector.
1869 Daily News 18 June None of the fish-tails seem to be as economical for common gas as the argands.
2. Surname of Jean Robert Argand, a French mathematician (1768–1822), applied to a diagram used for the graphical representation of a complex number.
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the world > relative properties > number > graph or diagram > [noun] > diagram
diagram1839
abac1890
histogram1891
alignment diagram1905
alignment chart1908
argand1908
nomogram1909
nomograph1909
histograph1915
Karnaugh map1958
Penrose diagram1973
1908 J. H. Jeans Math. Theory Electr. & Magn. viii. 258 The representation of a complex quantity in a plane in this way is known as an Argand diagram.
1959 G. James & R. C. James Math. Dict. (ed. 2) 20/1 Argand diagram, two perpendicular axes on one of which real numbers are represented and on the other pure imaginaries, thus providing a frame of reference for graphing complex numbers.
This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2018).
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n.1790