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perfect competition
perfect game
perfect gas
perfect hedge
perfect number
perfect participle
perfect pitch
perfect rhyme
perfect square
perfect title
perfecta
perfected first lien
perfection
perfectionism
perfectionist
perfective
perfectly
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perfect square
per·fect square (plural per·fect squares)


noun 
Definition:
 
kind of number: a rational number equal to the square of another rational number
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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