What is the name of this error?

I cannot remember what this error is called...I found this in a box of pennies I went through last night and was excited when I saw it was a blazing BU 1955-S and then even more when I saw it was an error.
Error is the blob on the 9 in the date.
Photos attached - sorry they aren't great today.

 

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You have a die chip in the "9". Nothing exceedingly rare or valuable but kinda neat.

 

Aha, thanks. Too bad it isn't worth a fortune...it still looks cool.

 

Must have been about the same time as mine. Lol cool find.

 

It's worth a very little premium of around $1-2, but still hard to find because it is an error after all.

 

Are there any on the reverse?

 

Looks like a small one on the right wheat.

 

A nice find and decent strike considering the die was already having problems.