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up·si·lon
 upsilon
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- pronunciation:
- uhp
sih
lan
[or]
uhp
sih
l
 n
[or]
Up
sih
lan
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition 1: |
the name of the twentieth letter of the Greek alphabet.
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| definition 2: |
in physics, any of several ephemeral particles whose mass is ten times that of a proton.
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