Y for Yak

Y

/wɑɪ/ noun: Y; plural noun: Y's or Ys

There are different Usages of the letter Y.

1. the twenty-fifth letter of the English alphabet

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

This letter denotes the next after X in a set of items, categories, sizes, etc. e.g. It also denotes the twenty-fifth of twenty five or more hypothetical people or things.

2. Abbreviations 

Y = Year. Besides, Y letter of the English Alphabet is used in Venezuela like YV as the International Vehicle Registration.

3. Science

Y = Yttrium  Y = Second Unknown Quantity in Mathematics usually dependent Mathematical Variable. Y = as in y-axis = vertical axis. 

The most Common Noun which is used to learn this letter at the Nursery level is Yak; Y for Yak.