单词 | abac |
释义 | abacn. Now rare. A type of nomogram in which the required value is determined by use of a ruler or other straight edge. ΘΚΠ 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 1890 Academy 8 Feb. 102/2 We miss any discussion of moments of inertia and the reduction of volumes, the construction of abacs and the representation of statistical information. 1913 Biometrika 9 539 It was proposed to include in Dr de Souza's paper two abacs or ready reckoners for the use of the obstetrician. 1934 Jrnl. Royal Aeronaut. Soc. 38 545 An abac is constructed to give rapid determination of exposure time in reference to time of year, state of sky, colour of subject. 1956 Electronic Engin. 28 533 A rapid method of circuit and transformer design is given in which a series of ‘abacs’ is used to evaluate the design constants. 1999 R. F. Graf Mod. Dict. Electronics (ed. 7) 17/1 Alignment chart, also called nomograph, nomogram, or abac. This entry has been updated (OED Third Edition, December 2011; most recently modified version published online December 2021). < n.1890 |
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