As far as I know it's just called the base, assuming anyone ever needs to call it anything (it's somewhat entertaining to try to envision a situation in which someone would desperately need to communicate detailed information about a Bunsen burner to anyone who wasn't in the same room and couldn't just look and see what portion was being pointed at).
the tip
The moving part of the bunsen burner adjusts the amount of air intake. This changes the appearance and heat of the flame.
the top
Robert Bunsen invented the Bunsen burner if that is what you mean?
Robert Bunsen invented the Bunsen Burner in 1867.
because Robert Bunsen made it :)
He was a pioneer in Photo Chemistry and also in Organoarsenic chemistry
Three types of laboratory burners are the Tirrill Burner, Bunsen Burner, and the Meker Burner. The Tirrill and Meker Burner have air and gas adjustments while the Bunsen Burner has only an air adjustment. Hope that helps.
Fire
In the fire
The Bunsen burner was named after one of its inventors, Robert Bunsen.
The tip of the blue cone is the hottest part of the Bunsen burner flame.