What does webmin exactly mean?

I have my own server application in C, I bind my server on localhost address 127.0.0.1 and let it listen in first case on port 10000 and in second case on port 20000
When I run command I lsof | grep IP in last column is:
in first case:
localhost:webmin (LISTEN)
in second case
localhost:20000 (LISTEN)

So instead of port 10000 there is webmin. What does it mean? I found this.
It says that Webmin is a web-based interface for system administration for Unix.
I’m not wise from that.
So what webmin exactly mean?
THX

webmin is associated with port 10000. lsof is “deducing” that webmin is what is running. For instance, if your app was bound to port 3306, lsof would think it was MySQL.

See this Wikipedia link for a list of well-known ports.

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