Definition of “phi”
noun:
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The twenty-first letter of the Classical and Modern Greek, the twenty-second letter of Old and Ancient.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
A visual illusion caused by lights turning on and off in a sequential pattern that implies motion.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
The symbol for the golden ratio.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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