y

y

y¹ or Y [wī]

n.

pl. Y's, y's

1. the twenty-fifth letter of the English alphabet: from the Greek upsilon

2. any of the speech sounds that this letter represents, as, in English, the semivowel (y) at the beginning of a syllable, as in yes or beyond, or the vowel (i) of myth, (ē) of holy, or (ī) of my

3. a type or impression for y or Y

4. the twenty-fifth in a sequence or group

5. an object shaped like Y

adj.

1. of y or Y

2. twenty-fifth in a sequence or group

3. shaped like Y

y² [wī]

n.

Math.

1. the second of a set of unknown quantities, x usually being the first

2. a variable

3. an ordinate

y³

abbrev.

1. yard(s)

2. year(s)

3. yocto-