Definition of "mu"
noun:
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The 12th letter of the Modern Greek alphabet.
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The name of a mythical floating island.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A unit of surface area, currently equivalent to 666 and 2/3 meters squared.
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interjection:
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Neither yes nor no.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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