• synonyms


See more synonyms for platy on Thesaurus.com
adjective, plat·i·er, plat·i·est.
  1. (of an igneous rock) split into thin, flat sheets, often resembling strata, as a result of uneven cooling.
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Origin of platy1

First recorded in 1525–35; plate1 + -y1


noun, plural (especially collectively) plat·y, (especially referring to two or more kinds or species) plat·ys, plat·ies.
  1. platyfish.
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Origin of platy2

1930–35; by shortening of New Latin Platypoecilus genus name, equivalent to platy- platy- + -poecilus < Greek poikílos mottled


  1. a combining form meaning “flat,” “broad,” used in the formation of compound words: platyhelminth.
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Also plat-.

Origin of platy-

combining form representing Greek platýs; see flat1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for platy

Historical Examples

  • The platy parting is the more common, but the columnar or prismatic parting is well exhibited at several localities.

    Mount Rainier


  • Strawberry Falls mark the front of a glacial step over a massive flow of platy andesite.

British Dictionary definitions for platy


adjective platier or platiest
  1. of, relating to, or designating rocks the constituents of which occur in flaky layersplaty fracture
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Word Origin

C19: from plate + -y 1


noun plural platy, platys or platies
  1. any of various small brightly coloured freshwater cyprinodont fishes of the Central American genus Xiphophorus, esp X. maculatus
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Word Origin

C20: shortened from New Latin Platypoecilus former genus name, from platy- + -poecilus, from Greek poikilos spotted


combining form
  1. indicating something flatplatyhelminth
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Word Origin

from Greek platus flat
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

platy in Medicine


  1. Flat:platyhelminth.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.