From what I've seen on several searches, that "Â" character ("A" with the circumflex above it) is caused by a coding error in HTML. I've seen the same complaints with it showing up in front of other symbols (like the British pound (money) sign, and the copyright symbol). As far as µm, ignore the Â! It is simply µm (micron, or micrometre if you prefer).
One coding fix I saw (do your own search) said to add an "&" in front of the character in HTML (I'm not a programmer, but that was related to a fix).
It means Mare.
Symbol= Mass: "E = mc2".
millimeters or M M
What does m times m times m mean?
In LEM what does the M mean
m&m yum!
i mean m a monomial
m^2 = m x m
Agriculture and manufacturing
depends on what you mean by m.
M = "Mike"
they mean the rainbow
Money making machine
The "M" you are referring to would usually mean Model.
That depends, 1.8 M of what you mean. Also, what type of money you mean.