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1. A flat disk of metal ready for stamping as a coin; a coin blank.
2. A small shallow metal container in which a radioactive substance is deposited for measurement of its activity.

[ Diminutive of planch, flat plate, slab, from Middle English plaunche, plank, from Old French planche, from Late Latin planca, from feminine of Latin plancus, flat; see plāk- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


a piece of metal ready to be stamped as a coin, medal, etc; flan
[C17: from French: little board, from planche plank1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈplæn tʃɪt)

a blank metal disk for stamping as a coin.
[1605–15; Middle English plaunche < Middle French planche < Latin planca plank]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.planchet - a flat metal disk ready for stamping as a coin
disk, disc - a flat circular plate
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
"And the chart is there as a proof," added Planchet, who went to fetch from the neighboring wall, where it was suspended by a twist, forming a triangle with the bar of the window to which it was fastened, the plan consulted by the captain on his last visit to Planchet.
Then, taking leave of Planchet, who was scolding his shopmen, even the cousin of Truchen, his successor, the gentlemen set out to pay a visit to M.
"Road to Fontainebleau!" cried Planchet to his coachman.
"Bon jour, Planchet," replied D'Artagnan, stooping to enter the shop.
"Quick, somebody," cried Planchet, "to look after Monsieur d'Artagnan's horse, -- somebody to get ready his room, -- somebody to prepare his supper."
"Thanks, Planchet. Good-day, my children!" said D'Artagnan to the eager boys.
"At your service, sir," said Planchet, overwhelmed with joy; "if I were still capable of serving you."
"Sir," said Planchet, "you must know; but, perhaps you ought not to know "
"Sir," said the prudent Planchet, "in the first place, are you on good terms with Monsieur de Rochefort?"
He preserved this opinion even after the feast, with the remnants of which he repaired his own long abstinence; but when in the evening he made his master's bed, the chimeras of Planchet faded away.
With regard to D'Artagnan, we know how he was lodged, and we have already made acquaintance with his lackey, Master Planchet.
Planchet, D'Artagnan's valet, supported his good fortune nobly.