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platy1

[pley-tee]
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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

platy2

[plat-ee]
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

platy-

  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

    Various

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


British Dictionary definitions for platy

platy1

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

platy2

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

platy-

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

platy-

pref.
  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.