Y, y

Y, y

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.

  1. yoctosecond.


  1. one septillionth (10-24) of a second. Abbreviation: ysec, ys

  1. The symbol for yttrium.

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