• synonyms


[plas-truh n]
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  1. a piece of plate armor for the upper part of the torso in front.
  2. Fencing. a quilted pad worn over part of the torso, for protection.
  3. an ornamental front piece of a woman's bodice.
  4. the starched front of a shirt.
  5. Zoology. the ventral part of the shell of a turtle.
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Origin of plastron

1500–10; < Middle French < Italian piastrone, augmentative of piastra metal plate, piaster. See plaster
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples

British Dictionary definitions for plastron


  1. the bony plate forming the ventral part of the shell of a tortoise or turtle
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Derived Formsplastral, adjective

Word Origin

C16: via French from Italian piastrone, from piastra breastplate, from Latin emplastrum plaster
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for plastron


c.1500, from Middle French plastron "breastplate," from Italian piastrone, augmentative of piastra "breastplate, thin metal plate" (see piaster). As an animal part, from 1813; as an article of dress, 1876.

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Online Etymology Dictionary, © 2010 Douglas Harper