单词 | planchet |
释义 | planchetn. 1. The plain disk of metal of which a coin or medal is made; a blank. ΘΚΠ society > trade and finance > money > coining > [noun] > coin-blank planchet1611 flan1866 1611 R. Cotgrave Dict. French & Eng. Tongues Flanc,..a coping, planchet, or plate of mettall readie to be stamped on, or coyned. 1748 tr. N. A. Pluche Spectacle de la Nature VII. xxiii. 284 The Planchet of Metal was horizontally laid upon this inferior Mass, to receive the Stamp of it on one Side, and that of the upper Die, wherewith it was covered, on the other. 1788 tr. J. von Stæhlin Orig. Anecd. Peter the Great xv. 60 A die was placed upon the place, a planchet laid upon it, and the bar put in motion. 1794 P. Wakefield Mental Improv. (1801) I. 136 To cut out as many planchets or circular pieces of metal. 1847 Debow's Rev. June 534 Each operating press requires a man..to keep a vertical brass tube supplied with the blanks or planchets to be coined. 1856 Sci. Amer. July 368/1 The planchet being pushed to its dish, is counterpoised by a just weight on the opposite dish; if the planchet is right, there is little or no oscillation. 1879 H. Phillips Addit. Notes upon Coins 8 In many instances the coin contained only a portion of the device, the rest having failed to reach the planchet. 1965 K. Skov tr. J. Brøndsted Vikings x. 190 It was probably German influence which produced coins of the same weight as before but on a larger and thinner planchet and, therefore, more crudely stamped. 1992 Numismatist Mar. 360/3 Coins were produced in regular presses and with a single blow, but using polished planchets. a. = planchette n. 1. Obsolete. rare. ΘΚΠ society > occupation and work > materials > raw material > wood > wood in specific form > [noun] > board or plank > types of quarter-board1355 deal1400 fir-deala1450 planchettec1450 crust1486 deal-board1568 slab1573 scabbard1635 scale1683 scale-board1711 planchet1730 shinbin1791 rack deal1808 rack1835 shinlog1842 slabwood1844 1730 J. Allen Specimina Ichnographica i. 7 ABC is the Copper, Brass, or Iron Vessel..firmly screw'd down to the said Plank by means of a Planchet or Border. b. Brickmaking. A small board for carrying a newly moulded brick; = pallet n.3 4b. Obsolete. rare. ΘΚΠ society > occupation and work > equipment > brick-making equipment > [noun] > board for carrying brick pallet board1664 planchet1764 pallet1839 1764 T. H. Croker et al. Compl. Dict. Arts & Sci. I. at Brick-making A planchet, or small board, used by the person who carries the bricks or tiles from the moulder to the drying beds. 3. Physics. A small shallow dish used to contain a specimen while its radioactivity is measured. ΘΚΠ the world > matter > physics > electromagnetic radiation > [noun] > instrument for measuring radiometer1875 spectroradiometer1923 planchet1947 1947 Nucleonics Dec. 46/2 This often requires removal of the active material from friction specimen and plating on a flat planchet in order to attain greatest sensitivity. 1961 G. R. Choppin Exper. Nucl. Chem. iv. 51 In case of reuse, each planchet should be carefully checked for residual activity. 1975 Nature 3 July 35/2 Radioactivity on the filter and in the frozen water vapour in the cold finger trap (after drying down on planchets) was assayed using a Nuclear Chicago gas flow counter. 1994 Rev. Sci. Instruments 65 1839 An electric field causes the particles to migrate towards the center of the instrument and onto the planchet. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1611 |
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