Why is information that cannot be seen called entropy?

[td21]

[Mentor's note: Edited to fix an error in the title]

I hope to know where does this definition come from.
Thank you very much.

 

[bhobba]

I presume you mean Shannon Entropy.

The cannot be seen thing is irrelevant - but its a definition that has proven useful - that's all:
https://en.wikipedia.org/wiki/Entropy_(information_theory)

Thanks
Bill

 

[Nick666]

My guess is for the same reason why energy that cannot be used is called entropy.