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Y, y

[wahy] /waɪ/
noun, plural Y's or Ys, y's or ys.
1.
the 25th letter of the English alphabet, a semivowel.
2.
any spoken sound represented by the letter Y or y, as in yet, city, or rhythm.
3.
something having the shape of a Y .
4.
a written or printed representation of the letter Y or y.
5.
a device, as a printer's type, for reproducing the letter Y or y.

ysec

1.
yoctosecond.
Also called ys.

yoctosecond

[yok-tuh-sek-uh nd] /ˈyɒk təˌsɛk ənd/
noun
1.
one septillionth (10 -24) of a second.
Abbreviation: ysec, ys.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for ys
Historical Examples
Contemporary definitions for ys
noun
noun

the last surviving master of Jedi skills who trains Luke Skywalker in "Star Wars"

Word Origin

"Star Wars" second film

Dictionary.com's 21st Century Lexicon
Copyright © 2003-2014 Dictionary.com, LLC
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ys in Science
Y  
The symbol for yttrium.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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