y¹ or Y (wī)
n., pl., y's, or Y's, also ys or Ys.

1. The 25th letter of the modern English alphabet.
2. Any of the speech sounds represented by the letter y.
3. The 25th in a series.
4. Something shaped like the letter Y.

y²

The symbol for ordinate.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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