: resembling a plate
also : consisting of plates or flaky layers
used chiefly of soil or mineral formations

Word History

First Known Use

1539, in the meaning defined above

Time Traveler
The first known use of platy was in 1539

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Cite this Entry

“Platy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/platy. Accessed 12 Jun. 2026.

Kids Definition

platy

noun
ˈplat-ē
plural platy or platys or platies
: either of two small freshwater fish that are often kept in tropical aquariums and are noted for their varied and brilliant colors

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