periodographn.
/ˌpɪərɪˈɒdəɡrɑːf/, /ˌpɪərɪˈɒdəɡraf/, U.S. /ˌpɪriˈɑdəˌɡræf/, /ˈpɪriədəˌɡræf/ Chiefly Science.
1. A periodogram; (originally) spec. a curve drawn in a periodogram. Now disused.
ΘΚΠ
society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > diagram > graph > type of
wave-line1888
periodogram1898
periodograph1899
Lorenz curve1909
bar chart1914
growth curve1916
bar diagram1923
bar graph1925
line graph1956
1899 A. Schuster in Trans. Cambr. Philos. Soc. 18 108 With T as abscissa and S2 as ordinate, draw a curve, which may be called the ‘Periodograph’... It will be seen that the ‘Periodograph’ corresponds exactly to the curve which represents the distribution of energy in the spectrum.
1936 Rev. Econ. Statistics 18 63/2 Like the Fourier periodogram, this periodograph will show distinct peaks in the vicinity of real periodicities.
1950 V. Conrad & L. W. Pollak Methods in Climatol. (ed. 2) xi. 370 The name ‘periodograph’ is no longer used and Schuster's ‘periodograph’ is now called a ‘periodogram’.
2. An instrument for automatically making a periodogram analysis or Fourier analysis of a curve by optical means.
ΘΚΠ
the world > relative properties > number > probability or statistics > [noun] > statistical equipment
periodograph1917
swingometer1965
1917 Science 9 Nov. 468/1 Following is the list of papers presented at the meeting... A. E. Douglass: An optical periodograph.
1946 Suppl. Jrnl. Royal Statist. Soc. 8 44 In the correlation periodograph, due to Martindale, the grating of the grating periodograph is replaced by a replica of the curve on a reduced scale.
2000 Amer. Scientist (Nexis) Sept. 440 In a 1914 letter to Huntington, Douglass mentioned having developed the ‘periodograph’, an optical instrument that allowed him to visualize cyclical patterns in his ponderosa pine tree-ring data.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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n.1899